Side projects that are making money, but you'd not talk about them?

I don't talk about my zines (https://kradeelav.itch.io) and artwork to people IRL -- it occupies a very liminal space in my mind and soul where I can mention things a bit too raw or depraved for office spaces. ;)

While I don't make zines to make money, per se (going as far to give a free digital copy on my site), there's still evidentially enough people that buy them that it technically counts.

I built a system to help people take payments with Google Forms. It was very much an MVP but I lucked into a niche that hadn't been filled, so each week a few people found it and started to use it. I charged 2% of the transaction volume (later lowered to 1.5%) and made about $3k before shutting it down at the end of last year to focus on other things.

Interestingly by that point there were much better, cheaper alternatives and the friction of switching was low, but I had a hard time convincing people to stop using it.

My partner and I started roasting and selling coffee (https://tinywaffle.co). My day job matches donations 2:1 so I've been funneling in proceeds to max the $10k benefit. It's been fun learning about coffee, marketing, and design.