The Steem / SBD are not reflected on our balances since 10 days now, so why not include the 10 day history in your speadsheet ? The Poloniex account valuated at 52 millions is probably not coins but registred incoming minus outcoming all times transactions, my guess is when Steemit launched their blockchain they made accounts for the exchanges on the same UI and never updated exchange accounts UI. Those informations should be on the white paper that nobody has ever read. The same for the Bittrex deposits: it's probably when bittrex users transfer money to poloniex. @ned should be able to answer those question btw. Thoses Bittrex deposits acctually reassure me, I am gonna worring when they stop. You have to understand that the cryptosphere is small and those people talk toghether, remember when ETH got hacked last year all exchange got the withrawal deactivated within minutes after an announcement from Etherum Foundation on the Slack. Now it will be interesting if they are silent on thoses channels too. To come back to Poloniex, I think they are preparing an exit scam.