its for sure waste of time in last half year, i participated in ~300 of them and received around 10 coins and they worth in summ 5$
atleast you get something from those airdropped coins. Not everyday you can get a penny for doing some little things like filling up google sheets. Even though most of the coins or tokens that's I get from airdrop is a scam I'm still greateful atleast I get some money out of it.