one more thing I love to add is merit are not enough for you to get accepted in the campaign as some time ago I applied in Elon coin campaign and did not get accepted which means even after getting enough merit or rank you need good luck as without luck manager won't accept you.
Earning merits, ranking up and having a certain number of merits in the last 120 days will make you eligible for most campaigns, but the final decision of selecting members for a campaign is on the manager, and they make that selection based on their criterias. If you are not selected by one manager, you may be selected by another soon enough.
I am thinking airdrops are also good side hustle right now.
I don't think so, maybe it was in the past, but not any longer, it shouldn't be worth your time right now.