Simply through making research regards them. Try looking on the whitepaper if it does have duplication then that is fraud and you should stay away from it. The other things you need to look at are the developer, the road map and more just do your own research. As a recommendation, I think you focus more on participating in a signature campaign rather than in a bounty campaign simply because yeah bounty could even provide great rewards however, it would be a lot difficult looking for them, most of them are just scam, unlike signature campaign which is more certain in giving rewards. But before that, you must first mind working on your rank though because I doubt you will be accepted having that rank, even in bounty the lowest rank they could accept is jr. member, make it a full member at least.