Its been extremely difficult to be profitable with airdrops recently. There is very little chance to earn a great amount without having multiple wallets. On the other hand, if you use multiple wallets then there is high chance that you will caught as a multi users. Not only that there is also no assurance that you will get a good reward at the end as all of these airdrop farming started due to speculation and no team made announcement about the airdrop criteria in advance.