Bounty hunters don't invest money but time and the fact is time is a valuable thing as well, it will surely hurt to waste time on projects that in the end they won't appreciate your efforts, the thing is if you aren't ready for some disappointments bounties aren't for you
Yes, you are right, but you must understand that too many people have come to cryptocurrency, as well as these people create multi-accounts, thereby lowering the cost of time spent.
And that is why sometimes i felt thankful if they are being axed because they also Cheat in reality , they even intentionally violated rules by enrolling alt accounts and taking the funds that supposedly for other members.
so being scammed or denied of payments is a way for them to pay their greediness.
so accept it or not? this will happen continuously and will never be resolved.