The biggest money making slot in crypto space is to be
1. a developer
2. build crypto wallets for new projects
3. find bugs in the system of many new projects
yes some paid for security breaching and all that stuff, rendering professional services is the best way to make money in crypto space now
I didn;t get your point, but honestly speaking, what is you're already pointing out is all about bounty

Bounty and Airdrop helps the developer to promote their project and in return they will give the participants their coin/token as a reward.