Cause the era is changing. Airdrops that are worth it nowadays requires you to spend some gas fee or money. The time were airdrops were worth it is like 3 to 4 years ago. That literally you earned a lot of money.

But now things have changed and we cant deny that dome airdrop now especially here wouldnt give you some good money. Try out your luck with some interaction airdrops were uniswap, 1inch, dydx and some others that give a suitable and considerable money.