I pinned that topic !
I read every one addition ... but I have to admit : I don't follow the bestseller list as closely as when SS2 was released.
Neither do I but I do still occasionally take a look at it. In fact every time I see a new post in this thread (I've pinned it as well) I immediately open up the list to see if it has gone up a notch. I do post an update anytime I've noticed a change, though.
Given that it hasn't had a sale yet I'd say its position is actually quite impressive.
As soon as it gets a sale, it will rock the list. Top 10 minimum, maybe it could even conquer #1, if timed right (together with a Steam release, for example).