We suffer the same problem. there quite a lot of airdrop that I followed, but there only a few can truly paid. there is also paid by coin, but there is no market of the coin. in Imtoken is full of airdrop coins that are worthless (no price) and moreover now a lot of fake airdrop which said just make us account to be functioned. I'm sorry too many join in airdrop. hopefully there's no problem whatsoever. better join bounty campaign only. if join in airdrop, beware because some airdrop a lot of cheats.