Okay... Let's do some maths. First, the percentages in the pay back is based on that they reach their $2,000,000 goal.
For them to reach 2,000,000 - they have to have 8,000 backers on the $250 level.
Backers will get 50% of the profits, and let's pretend this will be a $60 game. Then these 8,000 backers will share on $30 evenly for each sold game, pretending that there are no other costs involved in selling games ($60 game does not equal $60 profit in real life).
You will in other words get $0.00375 for each sold game. That means you will get all your money back when they've sold 66,667 games.
To reach the 120% of your investment: they have to sell 80,000 games.
NOW, you will have made $50 (since 120% of 250 is 300).
After this goal is reached, you will then get $0.001875 for each sold game until the game has been out for one and a half year. How many copies do you think they will be able to sell in one and a half year? Let's go with... 150,000 copies.
first, remove the 80,000 copies that you got 50% off, and we're left with 70,000 copies.
These will bring you $131.25
Add the $50 you made previously and you're left with $181.25 in profits. It's kind of weak for a 18 month investment, don't you think?
Do you think they will sell 150,000 copies of RollerCoaster Tycoon (possibly based on a mobile game?) for $60?
What if the game is priced at $30? Then they'd sell more probably. Well, then you would only make $0.001875 for each game sold from the start: and they would have to sell 133,333 copies for you to break even (get your $250 back).
160,000 for you to get that extra $50.
and after that, you'd get $0,0009375 for each copy of the game sold. What does that even mean? It means you will get ONE DOLLAR for every 1,067 games sold.
Again, this would be even less, because whatever the end user pays is NOT the profit. Nintendo probably wants a cut for having the game on their servers, paypal or other payment services probably takes a share too...
This doesn't make me wet my pants in excitement.