I think, before joining a bounty, you have to research bounty manager well. You should read the texts in bitcointalk about the bounty manager. And especially if you sign up for a signature campaign, you should also research good the project.
I agree with you my friend because a lot of ICO's today are not legit and their job is to take the hard-earned money of investors or traders. Scammers or Fake projects are the reasons why many people are starting to stay away in the world of cryptocurrency, with that there could be a negative impact in the market today. People must always check the whitepaper and it should have a realistic proposal and have a good vision towards success, it's better to do a research that ended up being a scam in the end.