Yeah, I agree with you. Or to be more precise, 90% of current ICOs are scams. Therefore, when you participate in any bounty campaign, please review the project information carefully. Not only did you not receive the reward, but you might also have helped the scammers.
In 2020 there are too many scam projects, even they have been listed at the exchange. But they still do not make bounty payments, need to be careful when participating in bounty at the present time.