joining an airdrop has the same benefits as participating in a bounty, only the task is simpler (as you said). However not all airdrops have simple tasks and require no capital because some airdrops have quite complicated tasks and require capital. for example, retroactive airdrop which requires you to have capital to carry out transactions to be eligible for the airdrop. but in my opinion lately participating in airdrops is more profitable because recently many big airdrops have appeared such as ARB, MANTA, JUQ, WEN, NOT coins.