Profitable airdrops are like needles in the haystack; airdrops nowadays are easy to calculate. Check the userbase, then the airdrop allocation, and one of the problems of airdrops now is that it has become a referral base; only the userbase with huge numbers of referrals are the ones that will get the big portion, so we can conclude that airdrops are for influencers.
The majority who cannot get big numbers of referrals gets dust; big influencers who have thousands get a large portion, so its not really fair.