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.