I suspect QS finds suchmoon's efforts as a threat. If he is still running an account farm, suchmoon's efforts must be frustrating his efforts to rank up his accounts.
I would speculate that this is QS's biggest frustration right now. I do suspect that QS is in control of TomatoCage, and he likely resurrected the account with hopes of landing a sig campaign, or selling the account for a decent sum. There's nothing more frustrating that someone attacking your source of income, and QS probably feels that suchmoon is doing just that.