It's becoming close to spam advertising, so he only needs keep on a little longer. Everyone has a right to their view, but after repeatedly going on and on and on running down one product whilst promoting another, it crosses the line eventually of being a view put forward and into the territory of advertising. He's said as much in other posts, that he's wilfully trying his best to steer people away from one product and towards another.
The so-called "biased" staff here are not doing anywhere near the shameless promotion of this individual. None of us are exactly raving on and on about RWC. Many of us are speaking about both games (sometimes with particular attention and interest towards Rugby Challenge). We're all pretty interested and excited about both.
I personally think reiterating your point 5, maybe even 10 times is fair enough, but he's re-bringing up his same points at some times when no-one is even questioning or debating him.
First step may be to lock the thread if it's just going to be an ongoing crusade. It can't seriously be called anything else.