What's the best donation/tip “jar” for a blog?

There are many ways to do this, but I pose the question: are you trying to build a community, or just make money?

If you think about your audience and work backwards from there, you might be able to answer that for yourself.

Off the top of my head I would say https://www.patreon.com/ would be the first step...

Side Note: I would warn against going for the “best results” and instead built the community... once you are getting funds to be able to worry about colors, affiliations, etc... that will be a good problem to have :)

Consider using multiple options, for example Paypal Donate and Patreon.

Ko-fi

Patreon

Just a PayPal send me link