Bounty or Airdrop many of them are scams but I prefer Bounties rather than Airdrop because still there have a bunch of Bounties worked rightly to give payment to their Bounties hunter. Mostly it depends on the project that how & how last long it worked & also project manager. But most of them are scams.
 I have only seen the best way of income on this forum is Signature. instead, of Bounty and Airdrop. if someone is a Legendary member their 1-week payment is more than if a buddy has joined two, or three campaigns at a bounty for 5,6 weeks their payment is less than having. that's your own decision which one is better. less time more money or waste of time & less money even if nothing