Hi Suchmoon, I found your math quite interesting. You are not saying whether you think 75K users is a realistic number, although I can guess the answer ;-) I personnaly think these numbers are at least very realistic and even very underestimated looking at the whole business model. We are talking about much more than just one game. Some will be more successful than others but in theory you only need one. I have played the game by the way, it was tested by many users, so not only whales, and I liked it, and so did my family. Only 6 days and you can try it out yourself.
75k is just to break even on inflation at $0.10 per ION. If you expect e.g. $0.40 per ION then you would need 300k average users just to absorb the inflation, not including the coins that already exist and are probably itching to get dumped.
Also "average" is important here. The stats don't mean that any game can generate $40 per user. Some do much better, some do much worse. For example when King Digital Entertainment (of Candy Crush fame) filed for an IPO in 2014 their ARPU was ~$20, barely average for that time. Of course they had millions of users.
https://www.sec.gov/Archives/edgar/data/1580732/000119312514056089/d564433df1.htmSeeing how ionomy struggles to develop, deliver, and communicate with just a few dozen users I really doubt they can scale to any level of sustainable revenue, even if the game is a hit. But we'll see on March 25 I guess.