Does it just need more time? Maybe spammers are unable to collect enough user data to target? What about telemarketers using a script with voice as virtual phone agents?
It's been around a few months. I'm just surprised it hasn't happened that we've heard of. Why not?
I think this may be happening with scam/spam email. I've definitely been getting more than usual in my inbox.
A favorite tactic is to make a couple dubiously-related posts (to look like a typical newbie) and then go back days later to edit in SEO-spam links.