Y allowed Mut the usage of his backup GW account, where Mut gave his last words.

Y followed suit, and is resigning from participating in anything relating to these boards. Many people spoke their parts in missing the two of them, others (such as Wilik and Assertn) weren't so gracious.

Y said for the moderators to do whatever they chose to do with his accounts. So, with them possibly banning / deleting them, they probably did the same with the thread.