Compared with the number of bonuses allocated, the bounty task is higher than the airdrop. In the bounty mission, signature and translation, making video is a way to get a lot of rewards!
Joining in bounty campaign is more profitable or there's a high chance to gain huge rewards but of course it depends on your skills and the signature campaign it depends on your rank and the project that you choose. It's better to not expect too much, be contented on what you got.