Sorry,
Yes - hardfork not an airdrop.
So what happens now - B2X is supposed to be listed on Bittirex on the 2nd January.
Are owners of BTC supposed to automatically get equivalent of B2X or we need to do something?
If they will list it then they should credit you at the time of the snapshot. The one big thing this hinges on is the replay protection. Bitcoin Gold didn't have it and as a result it was slow to get distributed. Bitcoin 2X will likely distribute at some point only question is now or later?