I should be more precise. What I really meant was, has a spam ever made it out of the holding pen of the new page and onto the frontpage? The new page only gets a fraction of the traffic of the frontpage.

I'm pretty sure the fact that spammers do something doesn't automatically mean it's worthwhile. There are some spammers whose stuff has been autokilled for months, but who keep submitting. They can't possibly be measuring the traffic they're getting.