Here’s the official post from the MaidSafe blog about Bittrex for those who haven’t seen it yet. Very similar to what nicklambert said here but it goes into more detail. I recommend giving it a quick read.
… we are currently having discussions with multiple exchanges and have already put plans in place to list with a large exchange out with the US. We will be working with them on promoting the new listing and we’ll make a joint announcement about this as soon as we can. MaidSafeCoin continues to be traded on Poloniex, HitBTC, Upbit, Cryptopia and CoinSpot.
For those who have coins listed on Bittrex they confirm on their website that they will give users “…up to 14 days to withdraw any delisted tokens, but in certain instances the withdrawal period may be shortened. Users should withdraw any tokens before the posted withdrawal deadline.”
I might add it ends optimistically 