+1 please to get an update on sales numbers. I've seen that the game is on top on Steam and GOG as well, and am really happy to see that!
I think it's better to update us with the sales numbers when the time is right. Time is right is when the steam/popularity of the game is dwindling or no further publicity is in place. I'd be honest, sale figures (or box office earnings) are one of my factors in buying the game coupled with various gaming (movie) review ratings and marketing effort.
The time is right probably a week after the huge update in august.
Swen have already stated 3 weeks ago that the sales were 250k or something. We don't know how much it was currently in today.