I saw this too. If it didn't have the tiny text there that said "Discover the adventure inside." Then I'd hardly consider it an ad. It is then almost "free" wallpaper. Which I frequently have to go out and find for games I actually like and play.

It's such a fine line between delivering something people want without them having to ask for it (nifty feature), and shoving things down peoples throat (ads). I really hope they address this properly.