Even if I don't see in the main post that these airdrops are handpicked, can you share some more info? For instance, did you gain something out of any of the airdrops that you suggest? How do you earn from this? Through referral links from these projects? I don't have your experience in this field of airdrops and which one is worth/ safe of doing whatever, but the more you share, the better for you. No offense, I'm just trying to understand what the criteria are for choosing the airdrops that you choose and how you can know if these projects can give something.
I make money off the referral programs, which around 70% of these projects have(benefits both the referrer and referee because of discounts and bonuses). That, and I'm a seed investor in some(<5%) of the projects listed.
As for the criteria, it's pretty much similar to investing in any token/stock — you literally do a background check and read the docs/balance_sheets to decide.