SegWit address cannot sign messages.
As signing messages are required for the airdrop, if you have a segwit address you cannot prove ownership, so you cannot get the airdrop.

Technically you can sign a message with a SegWit address, but no one can verify.

I created a post about that few days ago, when I learned about that, with more details:
https://bitcointalk.org/index.php?topic=2885058

Good news is that devs are trying to fix that... but semux is lost for that address now...