There is so much "buy me" junk already preloaded onto 7, seeing something else will not make much difference in 8IMHO.
(( The system I am currently using, came preloaded with a "game store". ))
So your blaming MS because the supplier you got your computer from preloaded software on it? That 'junk' doesn't come preloaded on Windows 7 (there's no game store on my copy of Win7), it gets installed by systems manufacturers. If you want to avoid it, either build your own system and install the OS, or buy a system that doesn't have an OS installed on it. A third option is to reformat the drive again and then install the OS yourself.