Is it allowed to participate in both airdrop and bounty campaigns? And how much I could earn in this case?
in all bounties or airdrops I think it is possible to participate in both of them so this is not a problem, and for how much you can I do not understand but if you follow the bounty maybe the rewards are quite large as long as you get a lot of stake.
If they don't like about promising amounts of money, I see that the airdrop is much more profitable than bounty.