Hoping this is on-topic. If not I can delete.
I own a couple of FOSS projects on Github, and have been toying with the idea of adding some kind of bounty to a few issues, since I do get a (small) amount of income via Patreon from which I’m happy to use to encourage contributions.
I’d rather keep things visible inside Github itself rather than hosting issues on yet another third-party site I would need to administer. I know there have been services like this in the past, but they seem to eventually stop paying out bounties and just disappear.
I’ve seen “boss.dev” showing up in my Google results and it looks to do what I want, but I’m skeptical since there seems to be no reviews or community around that tool.
The first bounty I would create for any project of interest is a bounty to move the bug tracker out of Github so those who boycott Microsoft can at least participate in the QA process.
So having a bounty mechanism inside Github is a bad idea. As a MS boycotter, I would be excluded from contributing bounties via the mechanism you propose.
Well, I’m using GitHub. I don’t know what to tell you.