You need real money to do that so that eliminates all the airdrop farmer bots which can lead to massive airdrop for the real users of the ecosystem.
That's untrue, airdrop farmers can and do use real money to farm airdrops.
Yeah I agree there are thousands of sibyls for big airdrops like this its so easy to create multiple wallets to farm airdrops the only problem if you did have enough money to take risk, some whales are doing this they are spending a lot of money like thousands of dollars I saw this movements from Arbitrum airdrops, they are profiting really huge amount.