It's a not-all-that-subtle form of internal advertising
It's also one that undermines my basic affection for Stardock, perhaps mostly because I believe advertising is immoral, but also because I believe I'm perfectly capable of looking around for a new game if I want one. Plus, I have an ex-scholar's obssession with enforcing consistency between category names and items in a category. Having this "stealth ad" in Games when we already have a full Sins site just seems very wrong.
This is placed in the Gaming category so it can be viewed site-wide
This very statement points to the fact that "site" means almost nothing around here any more. I suggest ditching that now-useless term and being specific about the named forum categories. The notion of a "site" was hard enough to keep clear back before folks started building dynamic HTML, and since then, well, the web metaphor has left the orb-building spiders behind for messy critters like the black widow.
Edit: I'm very interested in the NotMoM project and I'd have the same complaint about a thread like this for that game.