UPDATE: Poloniex is NOW looking for SBD team help to resolve disabled problem

Message form poloniex

"SBD is currently under maintenance or experiencing wallet/network issues. Deposits and withdrawals will remain disabled until a solution is found, which may require an update from the SBD team. Any updates must be tested and audited before enabling".

So it looks like Poloniex is asking for help from the SBD team to help resolve the disabled problem, SBD is currently trading at +46% against BTC