Casinos make money irrespective of your applied multiple  . Casino will make the same amount of money if your multiple is 1.01x or 10000x. If the sample size is large (which is like daily bets for a casino like stake.com ) casinos will make money irrespective of how an individual acts.
With sports betting, however, it is still not clear how to factor in the skill element, so you might have a case there: D.