Mostly this projects dont do bounties, remember all projects which found you trough advertise, work for some one, not for you
on the past like for example on the year 2017 there are many good and solid projects that have a bounty on this forum , they also have an airdrop as well . they are easy to spot and you cant go wrong on them . infact you can just even pick a bounty randomly and expect that it was legit but unfortunately all things have gone thru an end because these days its all good and solid projects are now only being advertise on a real advertising platform and not thru bounties .
If you just careful and ask the right questions before jumping in you can still find ptofitable bounties. The scammers take advatage to new things so it took a while for them to start scamming ICO. People need to be vigilent about the projects they choose to follow and always ask themselves why they follow the project in the first place. What sets them aprat from the other ICO.
You just said people use to just pick whatever at random and that is the problem. Only pick what you have true interest in.