I didnt get the airdrop either. And I didnt do amything wrong. Registered and signed a message and all that crap. Held onto it just for nothing but watching the price plunge. Bunch of crap
dude u can have multiple adresses on 1 wallet. go on this website
https://bitcore.cc/airdrop.php?info=all press ctrl + f and put in ur wallet adress and see if it is registered. And make sure that ur btx is on this adress and no other. I recieved my airdrop and i am almost shure u made a mistake