It depends upon the bounty as well as the participants. There are bounties that has small allocation in every campaigns but has less number of participants so in that case it is OK. While some bounties have high allocation but too many participants so for example you can only get $20 per week. On the other hand, not all campaigns are legit. Even these times, scams are still everywhere.
Airdrop ? I am not a fan of airdrop right now.
I agree we must first look at the allocation of the bounty campaigns, if it has a small allocation I avoid it. But if the allocation is large but
the participants are not limited I also avoid it. I am very picky when it comes to choosing a bounty campaign. Because I don't want the results of
my work for a few weeks to get a very small pay. I also stopped participating in airdrops since 2019, besides the pay is usually not too big,
which makes me lazy to join the airdrop, most of which require us to do KYC procedures. i will not give my personal data just to get $10-$20.