I get what you're saying. A points system within the arcade that would do something like:
If user scores 100 - 200 points in game, then they get 50 "credits" added to their "total credits". I'll use credits to distinguish difference between score "points" and the winnings from a game. I choose to not use the term "tokens" as it being too much like pogo.com.
I'm a member there myself, so I know exactly what you're talking about with all of this.