I don't see how releasing the mainnet client would mix with the exchange selling IOU tokens.  The mainnet would not interface with yobit or anyone else selling IOU's.  There is no real network connected to the yobit waves market it is just a fictional wallet they opened with X amount of tokens.  Depositing and withdrawing from them wont work.  There is no deposit or withdraw options for the people buying wave tokens on yobit.