We are working on improving our spam detection and prevention methods, and while we work on those, spammers are working on circumventing them. It's a constant war, and for every technological improvement we make, we're met with a step-up from the legions of spammers.
We've added substantially to our moderation team, bringing on 11 new mods in the past month. We've increased our range for IP banning, extending it out to cover wide regions where spammer nests are known to lurk. We're doing what we can to stem the tide, and I'm confident that things will start to improve soon.