You should really expect these kind of situation knowing that joining bounty campaigns wont really assure you that you can able to make money once the project did able to launch on exchanges.Some may succeed some may fail and the worst thing is that it would become scam. I have tried out this thing on which I do participate on some bounty campaign for a month but unlucky the bounty were too small which isn't really worth the effort but well it didn't make me stop however and treat those experience as learnings.