Dude, slap some water on your face and think about this again because you are making a rather serious error.
You are comparing the return on your investment to a number that will always be very close to 1%. The 1% is the EV of the GAME, not the investment. It is the probability that over a large number of rolls, the house will win 1% of bets.
Think of it in terms of a different kind of investment, say a grocery store. The grocery store has 1 million in sales and 10 thousand in profit in a year, giving it a profit margin of 1%. The investors in the store have put up 100 thousand dollars, so their return (assuming all profits are distributed) is 10%.
In the case of Just Dice, you are trying to compare the investors return to the store's profit margin. The two numbers are only related in that they both are calculated using the same numerator, the profit in dollars.
Ohhh... now I understand what you are saying.
Yes, you are right, the comparison is invalid. Though when the house profit is in the negatives, or near, its safe to say that a double digit ROI from an individual is a very good outcome. Eg. The grocery store's actual return has been -1%, the investors will take a -10% loss, in your example.