During my first month I've got about 60 000 downloads. I am not allowed to reveal sales numbers, but I can say that less than 1% of users buy DLC. The income doesn't even cover the food I eat while working on the updates. So in short the game is a failure.
I will still keep updating for a bit more, at least as long I think the game is fun to work on. The biggest drawback so far has been freeloaders who try to bully me into giving them the stuff they want (often free characters or online mode).
I am very grateful for the players who bought DLC, thank you! And since launch there has been about four new videos every day from Lets Players, which have been fun to watch!