The whole "sells = good" thing is blanketed, unless you want to explain in detail how you think it makes sense it somehow only works that way when it concerns "show business"? Otherwise, how convenient.
I have a question about this analogy. Has this game sold well? Well enough to be compared to any sort of mass appeal success? It sold ok, but it isn't on any charts anymore, is it?
It's a niche game that has only had any degree of success because there isn't any real competition for it. Don't get me wrong, I love the game, but it's hardly done anything to be compared to Brittany Spears or Taylor Swift at all. It's more like a local band that almost made it big and is still fun to go see live.
There may be a few console sales but I doubt there will be any huge movement on the PC sales charts.
It's got a ton of potential and is fun enough at realse, but it will rely purely on the mod scene to stay alive. This is no mass appeal thing, it's just filling a unique spot and that's all that's keeping it alive.