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.
I guess I would be ok sending the money on my own. But these other services have the nice feature of allowing other users to contribute to the bounty into a single pot. I.e., I can put a bounty of $20, then user b also really wants the feature and will add $5. When the PR is approved, the developer is guaranteed $25 and doesn’t have to contact user b to send their $5 or give out their financial info to X number of people.