apparently what happened to ArcheAge.
User ArchegeDown posted a thread on the forums on Friday, stating that a specific bug was responsible for bringing down the servers and that it needed to be fixed. To prove these claims, the user caused two more server crashes at scheduled times, demonstrating the ability, with the stated intent being to simply get Trion's attention. The thread is currently locked, but it's possible that subsequent server crashes are a result of other players discovering the same method of inciting a server crash.
[Thanks to xpactor and Matt for the tip!]