Nowadays, airdrops aren't profitable. But you can be sure that plenty amount of project is running coin/token distribution or airdrop. But 99% of them are scams. 0.9% of them aren't profitable comparing your time. Better you can participate in Bounty campaigns or Hodler Airdrops. Like DIA coin will airdrop in 2021. Read about
DIA airdrop.
Many airdrop tokens become trash in wallets because they are not listed on exchangers, although I think there are also airdrops that have little value. I still remember the Uniswap airdrop and I think it was the biggest airdrop I have ever had
Yes, uniswap airdrop is considered to be one of the biggest. I don't really like airdrops because they have a fairly small value and are usually only to attract people's attention so they want to join social media for a certain project