We have that as well, and ranked very highly for some long tails all relating to live sports events. However, it is our opinion that the traffic these links ge

We have that as well, and ranked very highly for some long tails all relating to live sports events. However, it is our opinion that the traffic these links generate is fake (and we have some evidence for it as well). I think it's aim is to trick Google into thinking it's a good quality result, or alternatively the links often are very heavy in adverts so the fake traffic routed via Google, your website and finally the spammers website could be used to generate lots of fake ad clicks in a semi realistic way. That's our conspiracy theory anyway, I very rarely see real world examples of content on the web being ranked so well so quickly and driving so much traffic in such a short space of time. As a small unscientific test when a seemingly popular spam sports event thread was posted, I deleted it and created a duplicate under my account. It didn't get any traffic at all. This in some way helps validate my suspicions that the traffic being driven is not a result of Google's process, but is artificial. I was going to write a blog post about it but never got round to it!