How Wagering Progression Works at Gamdom If you've ever opted in to a special promotion at Gamdom and wondered why your bonus progress moves differently depending on what you're playing, this article explains exactly how it works and why. How It Actually Works Your wagering contribution on special offers such as deposit bonuses isn't a fixed rate; it adjusts based on the expected house edge of whatever you're playing. Here's what that looks like in practice: Higher RTP / Lower house edge = Slower progression RTP stands for "Return to Player."