Spending much fees for eligible airdrop some time is not worth, many retroactive airdrop change their rule few days after snaphoot after participants loss much money for purchasing fees without hold minimum required amount.
Better testnet without spending much fees and has potential when the project launching their mainnet to earn much airdrop reward allocation,
There might still be airdrops for cheaper networks, so why can't we just do them instead? Those airdrops who constantly change their rules are unfair because it looks like their goal is to not reward their participants properly or give them only less tokens for the good quality of efforts that they have done. After all, it was still their project so they have the rights to do whatever they can. Guess all we can do is to move on and better luck next time.
Testnet airdrops are an alternative but their name says it all. They are free and the quality of tokens we can get might also be low or poor and there are also scams. I joined a lot of these in the past but I'm only disappointed.