well with the lack of advertising/promotion and given that it's a full on simulation which is not popular amongst gaming industry these days 5 mil is a dream number. It could hardly top 2.5 mil. Besides there are many things that aren't in that calculation table. Doing an international share distribution over internet? you guess the taxes on that, paypal will take a share as well.
I mean it's risky as well , I'm not even 100% sure this game will have all the features the devs are talking about heck I'm not even sure if they're going to release it. Talking about licenses as well. There's no way they can give the 70% of the revenue just like that. That number's gonna drop with every license they purchase.
You'll notice 30-70 diversion is not really clear.
There are publishers to think about, the company's own taxes, distribution channels, marketing and so on
It takes many millions to release a game these days, lets say the game sells 2 mil for 45 euros , that means devs will get around 10 mil out of their 30% share.
You tell me how they're going to finance all that with just 10 mil.
Seems a little optimistic to me