Poloniex are also doing the same, on the same date funnily enough. Omni is no longer required for Tether so unless the CEX lists MaidSafeCoin, why would they bother with the extra maintenance/security concerns.
The slight concern is that Bittrex also announced transition from Tether Omni to ERC20 at around the same time Binance and Poloniex did. With luck it will not be an issue until after MaidSafeCoin is dead and gone, but it does raise the risks.