I see plenty of Bittrex investors buying on Poloniex at sub-ITO price, then selling an equivalent amount of their captive BLOCK into the Bittrex buywall. Cross-exchange arbitrage.
I believe deposits and withdrawals are closed during this 48 hour so you can't arbitrage.
what he means is, they buy the same amount of btc on polo as they did on trex and then get rid of their trex stach and keep the polo stach
If they can withdraw bitcoins after selling blocks this is compleatly feasable and disgusting.
as we can see they are more interested in buying and selling at once as you noticed earlier
the question is when they run out of tokens

Well now that we can see it please DO SOMETHING. You and Synechist reach out to Bittrex and ask to stop the trading Now!.
This is completly against ITO rules and trading should not be allowed during the refund period. we cannot even check for real how many bitcoins have been sold as they are adding buys at 0.00025.
Please reach out to them and let them address this issue.