It seems that the requirements for getting a game into steam are set quite high.
I did some digging, and ive found out that the ratings are roughly at around 4% for 50.000 unique visitors, meaning that you would have to have 1.250.000 unique visitors before getting to 100%
Assuming that gnomoria has a constant growth in unique visits, it amounts to roughly 10 hours pr percentage, meaning 1000 hours (42 days) before gnomoria reaches 100%.
That amount just seems like too much. 1.250.000 is around a quarter of the steam users currently online. It would also be quite a giant boost in sales when the game gets accepted though.