I promoted five different projects to get a good one that cover for the hassle on all the five projects, all other four failed this is what bounty hunters can't escape, not all projects you promoted will be very good but few good ones are still available, if you are determined and less lazy you will eventually stumble on a promising project
So why every time I said people, Don't join random bounty/airdrop. before joining any bounty try to do some research. What's about the project, What is the main concept, who is the developer, Which problem solution they will provide, Is there any real-life use or not, etc? I know it is very hard to find out a legit project but it's not impossible. When you wanted to join any bounty, Try to check the bounty manager's reputation also. Because a good reputation person never will bring any scam bounty. Try to join those bounties that are managed by some good managers. It's not possible to join any bounty by reading the whitepaper, So if you follow the above tips you may get some legit bounty. But it's not guaranteed. Scammers are more powerful right now.