Airdrops are ending,, bounty ate beginning to end also. The most legit now is social mining.
I disagreed with this statement that airdrop is ending. Airdrop is even more reliable than the bounty that you will spend several months promoting and not get listed in a year after, Airdrop has minimal tasks that you can finish under 30 minutes even though if they don't pay, it is still far better than months of hard work without nothing to show for it. I have earned more on airdrops in comparison to bounties but required a lot of research and due diligent