* Is there a sticky explaining the differences of airdrops vs bounties vs signature campaigns?
Airdrop is useless unless you own a telegram/facebook group with more than hundreds people in that group so airdrop could bring you money.
Bounties is better than airdrop when you work alone - you will need to apply for social media campaign or content or translate and finish the task in each campaign to qualify for the stakes / token for each week.
Signature is one type of bounty and it has the own rules for the campaign - its belong to BM. Signature is good if you have higher rank in forum. And because people can join in 1 Signature campaign and have to follow it till the campaign ended so you can see each signature campaign has not much people joined.
* Do they favor my status (Jr Member I think I am) ... I know that higher statuses earn more at this point
Normaly all the signature campaign required Jr. Member as the lowest rank to qualify to join signature campaign. The higher rank you have, the more stakes you will earn.
* Can you participate in more than one?
If you join social media bounty so you could join as much as you could manage.
If you join signature campaign, you could join only one and you can join another one till the first one you joined has finish and BM has announcement about signature removal.