Another thing to remember is that the Steam charts only counts copies purchased from Steam itself. It doesn't count the ~16-20K copies gotten via D:OS kickstarter, nor any copy of the game purchased via other stores - such as GOG, Gamersgate, etc or directly from Larian themselves.
I have to say I am also sad that the ending did not also include a last conversation with your queen. I really wish that Larian had the time and money to add this in when making the game - and considering they had to completely scratch/ditch 2 main characters because of time & money constraints, I'm sure that's likely the reason the queen wasn't included at the end.
