Well, the peak in the nr of players at the same time was 2844 according to the statistics: http://steamdb.info/app/304730/graphs/. So we know that at least nearly 3000 copies have been sold. Given the price per copy and having a clue about costs and salaries in Switzerland, I would say that this is enough to pay a junior dev for max 6 months. So I surely hope they sold a lot more because I too enjoy the game 🙂
I think there might be a good numbers of sales in germany . I don’t know but i think atleast 50,000 copies should be sold for devs to make something out of this (is it too much ?) . I have no idea about game buisness ,I am just throwing numbers.
50,000 copies *20$(lets hope they make at least that much from 1 game)-1,000,000.