It's better to promote only good projects only, don't go on promoting any projects you see just because OP said tow to three bounties a year isn't a good plan, most projects are scam as we know it, that's why it's good to do your own research
That's right. Doing good research is very important in participating in bounty campaigns. However, sometimes the bounty hunters are fooled also! Even though we do really good researches, we can't guarantee that the project will pay or will be good! Doing bounty hunting contains a lot of risks that bounty hunters should be aware of and accept it!