Oh yes its a signature campaign which also requires you to buy $500 of onions to qualify. And they call it an airdrop, pathetic..
You should know, though, that for the initial months of their airdrop, they did give out the Onions free. After week 16, I think, they switched to a holders airdrop format ... its similar to what byteball did, switching to a format where their airdrops were only for holders. I think they found that too many people were entering the airdrop and dumping ... so they wanted to reward to the holders and people with skin in the game.