Last night I actually saw noticeably less RMT spam than usual. It was still there, but at least wasn't as constant.

Last time this happened, though, and I got my hopes up of there being some real improvement, I heard from other people that their RMT spam was getting worse at the same time (and later, I saw it back as well), so I think it was just the spammers shifting the focus of their attention a bit between servers. So I'm reluctant to get my hopes up again, particularly since we still haven't seen any features added to control it.