For a while I would participate in bounties from BitcoinTalk.org, but then I started using BountyPlatform.io. I have yet to get paid one bounty from them, so I started looking back on the site here, but I'm not seeing many. Did they move them to another category? TIA for any help.
You can also try this aggregate of bounties:
https://my.bountyguru.com/homeOr try using ICO ranking sites like icobench. com or icodrops.com and try to find projects with bounties there.
Though I usually make my own list of possible bounties and then make the necessary calculations in order to get the idea which campaign is the best.