Airdrop are the low effort way to get rewards. Bounty programs require more effort and skill hence they are more likely to pay you a better reward compared to airdrop. If depent on you if you want to spend your time/effort or do you have the skill to participate in it.
if we work totally in airdrop project , many times ita give alot reward than bounty campaign. There alot potential airdrop that may we meet and give thousands dollar.
airdrops also have so many shitcoins, it's 99 out of 100 that you gonna encounter shitcoin airdrops and get useless reward, I think it kinda depends on how you could choose the project.
after all it's always the shit projects that populate airdrops most of the time, currently the high quality airdrops always require some kind of staking like in binance where you are required to stake some amount to get airdrop of a project.