Deposit and withdrawal of SBD are temporarly disabled at Poloniex.
About 24 hours ago, I had transferred few SBD to my Poloniex account and Steemit showed that the transfer was successful. But history of Poloniex didn't reflect anything about that transaction. I wondered, what went wrong with the transaction.
Then after few hours, when I checked Poloniex again, I came to know that the deposit and withdrawal of SBD are temporarly disabled. I also saw a post about thus here and understood it's a common issue. Just now, I checked Poloniex again, things are still same there.
I hope it's a maintenance break from Poloniex and all will be back in normal soon. By the way, I also wanted to know some better alternatives to Poloniex.
There is open ledger, bittrex, and coinbase...
highly recommended you don't do coinbase because keeps crashing due to articles popping up saying coinbase crashes when bitcoins does dips.