True, 99% of companies will not send you coins. And the coins you get with a 99% probability will not enter the stock market. So be careful even better stay away from aridrops, because airdrop is very easy to make and anyone can do that.
If 99% of the coins are scams or no market , its better not to try to join on any airdrop cause its a waste of time. I stop joining airdrops because of the shit coins I got from it.