As already mentioned elsewhere, gg.deals should not be afraid of losing affiliate tracking by implementing a store selection, au contraire, your affiliate link clicks should go up.
Why? I dont even bother to click on certain stores, even they offer games cheaper, and if there is a customized pre-selection, I'd be rather more inclined to click on it.
For example, most of my Humble Bundle and Fanatical purchases are done through gg.deals, not directly.