HACKER Q&A
📣 rKarpinski

How do you protect your open-source side projects from copycats?


Hi HN!

10 days ago I did a Show HN post about a Chrome extension to speed up YouTube ads, which was open sourced under MIT license.

A member of HN who is also the admin of a developer community saw & commented on the project. Rather than support it as a contributor, they functionally copied it, created their own Chrome Web Store posting and shared it on r/webdev with zero acknowledgement or inclusion of the original MIT license.

I've documented in detail the whole experience.[1]

They now have an order of magnitude more traction with 10k+ users.

Although I'm happy that our project now has contributors it's hard not to think any work we do won't just continue to be copied.

Any advice would be appreciated.

[1] https://github.com/rkk3/ad-accelerator/blob/main/lessons_post.md_post.md


  👤 battles Accepted Answer ✓
Probably not the first time he's taken credit for someone else's idea. This quote from him in the subreddit is pretty funny. "Lots of discussion and outroar lately about Chrome and YouTube forcing ads on users via blocking ad-blockers. It led me to thinking about how I could address the problem with my existing skills." His 'particular set of skills' of taking ideas from HN and passing them off as his own.

👤 flaptrap
First you look at the MIT license (https://opensource.org/license/mit/): "Copyright

"The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software."

Assuming the full license (I omitted about 892 characters) were in the original the derivative work omitting the original notice violates the license. In USA, you register your copyrighted work and can sue for statutory damages.

Patent protects an original idea (reduced to practice) and one precept is that the idea got independently used only after it was disclosed to the public. Obtaining a patent from the PTO is not a trivial matter and then you can sue for your lost profits, damages based on the defendant's profits, or prohibit use by anyone. All of this assumes you really care.


👤 tshirttime
Most MIT licensed projects don't get any attention, and none of them make money. Consider your project an outlying success.

👤 al2o3cr
LOL @ "functionally copied" it. Are you trying to claim the idea as an original invention?

The MIT license is for the code artifact; if you want to control the IDEA you'd need much stronger measures like a patent.


👤 squigz
How do you know this was actually copied from your code? Is there a link that I've missed to a source for the Chrome version?

👤 0x6461188A
Here is a seemingly counterintuitive idea. Can you partner with them? Together your team could be unbeatable. You provide the engineering, they provide the marketing.

As you point out they have an order of magnitude more users. Evidently they have some skills in marketing and distribution.


👤 fsflover
> which was open sourced under MIT license

This seems like the main mistake. Try AGPLv3 instead.


👤 corn-dog
This guy again. I’m getting REALLY sick of this guy. I’m the person that made the code, this guy and one other have been harassing me on every platform I’m on accusing me of “stealing” his MIT licensed code in public forums. First it was Discord to a server of 1000 people. Then it was spam messages to all these people in the server. Then it was reddit. Then it was the chrome web store. Now it’s also HackerNews and GitHub! 1. I told you I was probably inspired by the idea. I make extensions daily, I always comment on and take inspiration from extensions and others ideas! But I was mostly inspired by the constant discussions about YouTube and adblockers all over the media. Your idea is not unique! You did not discover this method! 2. I already make tons of extensions, this is super low hanging fruit - so I made it. To figure out the basic functionality took 1 minute of investigating the DOM in YouTube. Inspect element of the video player, look at its properties, notice the playback rate property, toggle it, that’s it. 3. I wrote my own code because it’s as simple as setting the video playback rate to 16, doesn’t take a rocket scientist. I did not need to copy your code. It’s simple as hell. Anyone with half a brain cell would figure it out in 5 minutes. I even share my code below. 4. If I copied your code, why was my first iteration a bookmarklet and not an extension?! A bookmarklet which I mention in the original post, that I also shared with users in other forums I’m in. So tell me why I would bother with a bookmarklet if I could just copy your code as you said? THE SAID BOOKMARKLET CODE: javascript:(function(){ function clickButton() { const button = document.querySelector('#skip-button\\:5 > span > button'); if (button) { button.click(); } } function adjustPlaybackForAds(target) { if (target.classList.contains('ad-showing') || target.classList.contains('ad-interrupting')) { const video = document.querySelector('video'); if (video) video.playbackRate = 16; } }

    function waitForVideoAndObserve() {
        const video = document.querySelector('video');
        if (video) {
            video.playbackRate = 16;
            video.autoplay = true;
            video.muted = true;

            const player = document.querySelector('ytd-player #movie_player[aria-label="YouTube Video Player"]');
            if (player) {
                const observer = new MutationObserver(mutations => {
                    mutations.forEach(mutation => {
                        if (mutation.type === 'attributes' && mutation.attributeName === 'class') {
                            clickButton();
                            adjustPlaybackForAds(mutation.target);
                        }
                    });
                });
                observer.observe(player, { attributes: true });
            }
        } else {
            setTimeout(waitForVideoAndObserve, 500);
        }
    }

    waitForVideoAndObserve();
})(); 4. Hard work. What a joke, this took me 4 hours tops to convert from idea to bookmarklet to extension . It’s about 60 lines of code in a content script that a monkey could write! I’m that monkey! And it only took that long because I had to keep pinging YouTube to get an ad to play! Wait for video element, then increase playback and mute! That’s it! Yet you are under the impression this is some arcane knowledge that must be copied to be believed. 5. I actually DID look at your code after thesr accusations appeared, I even posted both our code in the server for others to come to their own conclusions! Additionally you use background scripts and content scripts - I just use a content script because … why would you even need a background script? You don’t. 5. You are discussing legal advice - cute. Now HARASSMENT and slander, those are legal discussions 6. You and the other user who have been harassing me have been doing so with alt accounts, across platforms, now harassment does fall under legal eyes. Yes i have begun taking action on this. 7. This guy thought telling me my real name would scare me and all this stuff about “karma”. Ooo clever. He just got it from the license text by reverse engineering my extension, but it was meant to scare me. Yet he is the one with the very public profile and VERY easy to find information. 8. And then this guy and the other person started a defamation campaign against me on all these platforms, going so far as spamming every user on the server I run, that I put hard work into growing. 9. I also just looked at your “lessons”. I noticed we use completely different methods for detecting ads, and on completely different elements. Add to that, you set the playbackRate to 10, I set it to 16, copied? 10. And now to add to the fire you are continuing to slander me and share my usernames in this lessons thing on GitHub! Should the prior art extensions who were already doing this exact function also be complaining against you? I'll even share MY source code just to get this person to shut the fuck up and claiming all this crap: // content-script.js (function () { function clickSkipButton(player) { const skipButton = player.querySelector( ".ytp-ad-skip-button-modern.ytp-button" ); if (skipButton) { skipButton.click(); } } function adjustVideoPlayback(player, isAdPlaying) { const video = player.querySelector("video"); if (video) { if (isAdPlaying) { video.playbackRate = 16; // Speed up the video video.muted = true; // Mute the video } } }

  function observerCallback(mutations, observer) {
    for (const mutation of mutations) {
      if (
        mutation.type === "attributes" &&
        mutation.attributeName === "class"
      ) {
        const player = mutation.target;
        const isAdPlaying =
          player.classList.contains("ad-showing") ||
          player.classList.contains("ad-interrupting");
        adjustVideoPlayback(player, isAdPlaying);
      }

      if (mutation.type === "childList" && mutation.addedNodes.length) {
        clickSkipButton(mutation.target);
      }
    }
  }

  function setupObserver() {
    const player = document.querySelector("#movie_player");
    if (player) {
      const observer = new MutationObserver(observerCallback);
      observer.observe(player, {
        attributes: true,
        childList: true,
        subtree: true,
      });

      // Initial checks
      const isAdPlaying =
        player.classList.contains("ad-showing") ||
        player.classList.contains("ad-interrupting");
      adjustVideoPlayback(player, isAdPlaying);
      clickSkipButton(player);
    } else {
      setTimeout(setupObserver, 50);
    }
  }

  setupObserver();
})();