If you have a Nxt (NXT) balance on Bittrex during the December 28, 2017 snapshot, you will be additionally credited the equivalent amount of Ignis airdrop tokens on a 1:0.5 basis. i.e. 1 NXT on Bittrex held during the on-exchange snapshot will get you 0.5 IGNIS airdrop tokens. NXT held on orders will also be credited. Only the NXT held on your account is eligible for IGNIS airdrop tokens.
Bittrex will make all reasonable attempts to credit our users IGNIS but until we have a fully supported wallet, we can neither guarantee tokens or consider creating a market. We will continue to monitor the state of the codebase and network.