Actually there are still some good bounties to join, we just need to search for it carefully.
Scam projects that running bounty campaigns are worst, because they scam 2 kind of peoples, their investors and their supporters.
Just by participating in the campaigns listed at the exchange, I believe we will get some money from them without fear of them becoming scams. Do not join the bounty of new projects because it is too risky, if the project fails then we certainly will not receive tokens from them.