in this particular order:
1. Translation
2. Content creation (video,article) - Signature.
I put content and signature in the same rank, sometimes it's more profitable to gain in content and vice versa. You can submit multiple contents for 1 bounty and get a bigger reward. Signature on the other hand's matters in terms of the rank of the member participated. Let's say if you a have legendary rank and participate in last weeks of the bounty, you still can get the same amount of stake for the people who joined earlier.
but in the ends of days, something that not crowded enough where people joined bounty and have a solid project + team give you a bigger chance score some nice rewards.
Airdrop is waste of time. And you will need a lot of time to earn something (2-5 dollars is not income)
Own blockchain is not an indicator of project reliability.
I agree, most of the airdrops are not worth it. But some of them give nice rewards. In the past Stellar (at the time it's ticker STR) doing airdrop on this forum and for a today value, it's tremendous price.
A few months ago I also participate on another 2 tokens airdrop and I got like 3 month's worth of signature rewards. Mind you I did not cheat and only using 1 id to claim my airdrop, not even a referral too.
So yeah, many of them are worthless, not a reliable one. But if you can spot a good one you get a nice reward.