Does participating in airdrop pays off. I think is a waste of time. I paid an ether of 1$ to receive an airdrop which sells less than 0.8$.
DeepOnion is quite a rewarding airdrop, the rules for entering are much harder now than they once were but that is due to increased popularity and coin value.
People who have been in the aidrop since the beginning would have thousands, if not tens of thousands of dollars worth of Onions.
Most people are getting a couple hundred per week which is very worth it.