It's good that you notice it, as you can see the Defi projects are in hype right now that is also the main reason why there are plenty of projects that are popping up from nowhere.
So as a fellow bounty hunter, it will be good if we will be wise in supporting any bounty campaigns and it will be good if we will do some background check also before we will start supporting a certain project.
just like when the ICO and IEO goes hype. the scam projects are everywhere. it goes the same way with DeFi now. there are so many projects that have abandoned by the team. they just robbed the investors money.