Allow a configurable default platform(s) under settings. The addition of a default for ALL platforms has made GG.DEALS more cumbersome to use. As a user's platforms are pretty static, being able to disable all listings for a platform(s) the user doesn't own removes the need to select the platform(s) for every single activity (browsing, searching, etc.) on GG.DEALS.
E.G. I only game on a PC, so now I have to select PC EVERY time I do ANYTHING on GG.DEALS to filter the results.