Airdrops are just a name, more importantly the purpose behind those airdrops. We should really call it the Airdrop since the purpose of the project is to develop their community's reputation, besides, it's all for self-interest so we can avoid it.
Making money is not easy, so before participating in any bounty or airdrop campaign, you should also analyze the project before participating. If we are lucky, we will receive a big airdrop like Energi and Railblock did.