On another note, I should add that airdrops are more profitable if you hold the tokens in your wallet for a while, as their value often increases. For example, I once received around $60 worth of tokens, and months later, that amount grew to over $200—same tokens.
That doesn't work all the time. I used to participate in some of the airdrop projects from Telegram, and I held some of the tokens I received from those airdrops because their value was very low and I thought their price might increase later and I will then sell them, but believe me, I'm still holding them, not because I'm still hopeful, but because they are worthless now, selling them wouldn't get me anything, and centralized exchanges don't even allow you to trade coins or tokens if they are not even worth $10.
Since I've lived through it myself, I wouldn't recommend anyone holding coins or tokens they've received from an airdrop, unless they have been closely following a project and they know it has huge potential and it can stay very long in the market, but mostly, that doesn't happen with projects doing airdrops because I believe only the projects that aren't fundamentally very strong make use of airdrops to gain some exposure.