pimpmonkey2382: How many games do you have on here?
That's not a relevant question. The relevant question is how many games I have from bundles which are also on GOG.
I checked a few, and I grant you that GOG often has more extras. It does lack soundtracks or has only partial ones in many cases. For example Botanicula, Brutal Legend, Shadowgrounds and many more Humble Bundle games I own which are also on GOG don't have soundtracks on GOG. For Ring Runner, which I got from Indie Game Stand, I got not only a full soundtrack (compared to 7 tracks on GOG) but also a novel.
As I said before, I take it back about extras, GOG does provide quite a few of them, but for some extras it's better to get them elsewhere, and from bundle sites you often get both DRM-free and copies at other stores (Ring Runner came with GOG, Steam and Desura codes, but it's an extreme example). Couple that with better prices, and at least for me the conclusion is clear that bundle sites are a better place to get games than GOG (given the limitations of bundles, of course: limited selection for a limited time.)