You'd probably be better served going to somewhere like Adult DVD Empire and checking through their all-time bestsellers list...XPT represents a comparatively small proportion of the porn-buying public (or not, in the case of The Fatman, who is neither small nor buys porn), and thus will return a skewed result.

I'd recommend visiting a few different sites to get a decent sample of the buying habits...I recently took a gander at ADE's All time top 100 bestsellers, and POV was nowhere to be seen...big-budget features, cheap comps and older catalogue titles seemed to be the order of the day.

As for your question, I'm not a POV fan, especially 'true POV' where the male performer and camera operator are one and the same. Filming and fucking at the same time means your hands are occupied with holding the camera steady and operating the zoom ring, when the could arguably be put to better use copping a feel of Gianna or Sativa Rose's boobs...there's a good reason why God gave women two tits and men two hands, and who are we to question his divine wisdom?