Dell sell far more computers with only an IGP and 750ti type card. I doubt many offices have a 960 and 950.
Even if we accept that cards lower than the 970 sold I'm greater volume, which I certainly agree was traditionally the case, that doesn't stop the o79 selling proportionally higher than in the past, which is the only point I was making.
1080 level cards are absolute niche and the volume is somewhere much cheaper but I think the price of mainstream cards has increased due to removal of the bottom tier of cards to IGP. The 970 undoubtedly sold far more at that price point than previous generations.
I'm not saying AMD's strategy is poor, they certainly need modern efficient small low end and mainstream parts. But don't u derestimate the sales volume of the 1070 and the fa t that nvidia will have GP100 cards soon enough to compete with Polaris 10/11