https://poloniex.com/press-releases/2017.06.07-Improving-Our-Support-Capacity/Withdrawals/Awaiting Approval
We are legally required to know the identity of our users and to maintain strict controls over how funds leave our platform. In addition, our auditing system flags for specific activity to ensure the safety of your funds. While we cannot reveal precisely what triggers such flags without compromising the integrity of the system, we want to highlight how our efforts to keep our platform safe and secure can degrade the user experiences at times. For example, when our system flags an activity as suspicious, the ensuing investigation and resolution usually requires human intervention, which takes some time. As we gain more users, they naturally trigger more flags that require more of these slow human interventions, so more human resources are required to handle the volume.
Automation here is tempting to rush, but difficult to get right. Large financial institutions have spent years fine-tuning these functions. Our rapid growth does not permit us that luxury, but we can learn lessons from their operational successes. As we improve our support more generally, we can address these tickets faster. Users should start noticing incremental advances in the coming weeks.
As we implement these changes, we encourage our users to be patient and not submit repeat tickets. The vast majority of our open tickets consist of duplicates. Submission of repeat tickets only increases our backlog and does not get your ticket reviewed faster. Manual effort must be expended to identify, match, and consolidate tickets to ensure the issue has been addressed. Repeat submission needlessly slows resolution not only of your ticket, but of all other outstanding tickets.
They've also closed their troll box and assigned all the trollbox moderators to helping clear their support ticket backlog