Well, let's not get ridiculous. What people on GAF do or do not buy has zero impact on the industry as a whole.
No Life No Game is a pretty basic idea that could have been made in any time in the last 20 years, just fuse the traditional gambling show (Kaiji, One Outs, Akagi) with cute girls and gaming references. The only thing that's unique to the show as it is in this era of anime (the pandering to creepy otaku era) is the relationship between the main character and his underage sister. The show isn't build around creepy loli incest and so you could easily remove it and the show would basically be the same. However, because it's a work in this era, the creator inserted those particular tropes because that's what the audience is looking for.