Tom,
I have had several owners set their greens fee below $50 to keep in the GD "Best New Affordable" category, which is easier to win, place, and show in.
I think most golfers are value conscious to start with. I bet most seek out the best new value courses in their area. How many of us really travel just to see a "best new" resort course? Presuming we average one golf trip a year (maybe two) there are still far too many courses out there that we want to play. It is a rare course that bumps an old timer off the list to be must play in place of some other famous course.
Obviously, GD recognizes that you can usually do more with more money. I suspect the big winners would be courses on spectacular sites, but then, what else is new?
Can we really parse it more than over/under $50? Would taking Pebble Beach's 8.whatever score and dividing it by $400 to yield a value adjusted score of 0.02125 make people want to play it less than Rustic Canyon, that might have a 7 score divided by $40 (estimates, I don't know the actual numbers) for a 0.175 score, or about 8X better by that system?
I think most of us here would say the rankings game is maxed out and already hard enough to understand, justify, etc. In general, I think the mags do a good job of having writers just tell us whats pretty good out there for the price, without any more detailed rankings.
Just my $0.02