The issue you've identified is one of two perspectives: 1) for the individual bettor, and 2) for the sportsbook. From the individual bettor's perspective, the price they will be charged on traditional sportsbooks compared to FansUnite.io is -110 (1.91) compared to -102 (1.98). Obviously, this is a pretty big difference. For the invidual bettor, they are being charged 9 percentage points on the true odds of the game (2.00) at other sportsbooks, compared to just 2 percentage points on FansUnite.
From the Sportsbooks (FansUnite's) perspective, the margin (or juice) is just 1% on a given match. That is our spread in the odds and likely profitability on the volume of wagers.
As stated in response to your previous question, FansUnite will be the counterparty to the bets.