The majority of the people who participate in bounties might be spammers, but not all are spammers. There are still legit hustlers on that board who are just looking for a way to earn free tokens, which I don't think is really working well for them considering the number of failed projects and scam accusations against some bounty managers and some scam project heads too. Bounties are almost a complete waste of time.
What I recommend to the OP, if he prefers to participate in bounty campaigns, is to work under bounty managers with a good reputation in the forum. Although this does not guarantee that he will get paid because the project team is usually responsible for the distribution, it is less risky than new and low-ranking bounty campaign managers who cheat in the spreedsheets by adding their alternative accounts, which leads to unfair distribution and other participants get crumbs, or they end up promoting failed or scam projects. Therefore, this requires doing proper research. It's also a good idea to work on bounty campaigns that have an escrow
allocation in place.