When you used your Private Memo Key with 
@bittrex or 
@binance before and you found someone used that Key to claim Byteball Byte (GBYTE) "airdrop for STEEM users" by using your Steemit Reputation Level, before you try it.
Original Source
Didn't you join that "Byteball Byte airdrop" yet?
@bittrex or @binance before and you found someone used that Key to claim Byteball Byte (GBYTE) "airdrop for STEEM users" by using your Steemit Reputation Level, before you try it.
Original Source