OK, so we've gotten far off the original topic here.
--My simple point, was that green surfaces with a high or even moderate percentage of unpinable space MIGHT be considered too costly to maintain for the AVERAGE course. That MAY explain why you do not see greens like that on a daily basis. (however, I played Pinehurst National today and those greens have a significant percentage of unpinable areas, to the point of severity. They were puttable today due to the green speeds being a posted 7.5 ft, due to recent aerification, but those greens at 10, 11 or higher, I couldn't imagine) As to why these green features are not seen more often at higher end clubs with large budgets and/or low volumes of play, I can't answer, I have never been a member of, or worked at, an extremely high end private/resort facility.