I would say that mentioning games retailers is a good thing, seeing as overclocking and performance hardware is your business, and PC gaming being a core reason why people buy the products from OcUK. I'd look at discussion around where to buy new games being beneficial to you, from the perspective of people upgrading rigs etc.
Just a thought. If it were me, I wouldn't want to stifle discussion and hype that leads to purchases of performance hardware. Especially not for the sake of the thin sliver of profit you might get from stocking a few titles at (most likely considering the numbers you'll probably stock/sell) uncompetitive prices.
This community knows all of the competitors anyway, making people use pseudonyms isn't going to change that.