Replying to my own comment: Just independently saw a link to Bounty Source today. This appears to be very similar to what I'm asking for, although more designe

Replying to my own comment: Just independently saw a link to Bounty Source today. This appears to be very similar to what I'm asking for, although more designed around adding bounties to GitHub issues for features/bugs on existing projects. https://www.bountysource.com/ https://www.bountysource.com/