Look on the spreadsheet.

Potential airdrop, so basically like a rumor. Well, it's up to you to participate or not most people will try to get and join at least some of them. About fee don't really comment a lot, is up to the user. But while the airdrop can become true and the reward is crazy just don't cried to much because you not joined even already know is on the list.

There is no guarantee at all, the reward will be crazy.