slot machines tend to use the '97% payout' syntax, while table games e.g. craps/blackjack tend to use the '1% house edge' syntax. I prefer the 1% house edge syntax, personally.
Will
I think when you're trying to disguise that your slot machine keeps 12% of wagered amount, saying "88% payout" does the trick.
If you're trying to advertise that the payout is good, "1% edge" looks better than "99% payout".
For example, comparing JD to SD:
* 99% vs. 98.1% makes them look similar - both close to 100%, but
* 1% vs. 1.9% makes it look like JD is about twice as good as SD
But maybe that's just me.
That's actually exactly why I suggested an A/B test - take out the "I think"s and the "maybe that's just me"s and go with what is demonstrably better for encouraging your customers to play (whichever that is.) I honestly don't know which is better. As for the wording for a potential test, maybe "99% player odds" or something. It doesn't have to be mathematically or semantically accurate, you're just doing marketing to get them in the door. You ever go ask for the house rules at a casino? They have them in these thick packets, and they've got all the legalese you'd ever want and more - but they don't give them to you unless you ask, because it's generally known among players what 99% means. You've got all the fine print laid out already - my suggestion is simply that you don't limit your marketing to the same legalese standard.
