Right, bounties and airdrops are becoming more and more worthless, especially airdrops. Nowadays, finding a good bounty is as difficult as finding a needle in the haystack. It's notable that many people are still doing bounty as a full time job. It's totally a misconception.
We cannot say it in a whole totally worthless because there are still bounties worth but, it just hard to find one. But in my experience its better to look first the bounty manager before joining in such a campaign, because I already get experienced by getting nothing after campaign, when I joined in a bounty that the manager only a bewbie or a copper nemeber, it is succeeded but they didn't pay the bounty hunters afteall we had made push project into success.