Why not? There are a lot of legit ICOs and airdrops who pay. The time and effort who you do for an airdrop are minimum and it takes a little time. So I think that you need to continue with airdrops. but you just study the projects well, do not get join in bad projects, take quality rather than quantity.
Just joining the airdrop is actually quite short. But studying the projects and finding this good already takes a lot of time. The effort put into the search is inaccessible to the reward received for participating in the airdop.