But if they pay in advance it isn't until they get the renewal bill at the end of the year that they realize how much money they've 'wasted' and by then they are out of the habit of exercising.

You wish to bill for the initial game purchase, for the other game-related paraphernalia, for game subscription or time played, for game subscription renewal, and for anything else you think you can!

“A clean bill of health”, “a clean record”, “clean sweep”, or “good clean fun” evoke wholesome flawlessness, renewal or order.