I do not believe good architecture has much to do with the financial success of a public golf facility. As I said in the Hendren thread, I think views/setting, conditioning, marketing, and as I think of it now, the facility as a whole (clubhouse, range, restaurant) have a much bigger role in appealing to the masses.
However, GCA is not without bearing on the success of a course. In trying to think of examples where the architecture was the primary factor driving a course's success, the one that came to mind was Wild Horse. Bandon's courses, for example, despite the great architecture I believe were put on the map and appeal to the masses in large part due to the ocean and the ability to put the 4th at Pacific Dunes on a full-color ad or brochure.
All this said, I do believe architecture plays a role, even if J. Q. P. doesn't realize it. There are features of good architecture that your weekend duffer or bachelor party foursome will appreciate without knowing why (or even that it was intentional). What comes to mind here are things like options (particularly on a par 5), multiple shots around the greens (chipping areas, contours and runoffs that allow you to play bump and runs), a good cape hole will likely be a favorite, and interesting greens are typically appreciated if they're not too daring or outside the box.
On the opposite side, JQP will see things like a biarritz green and think it's "tricked-up", a green that slopes from front to back is "mickey-mouse" and heaven forbid, fast/firm conditions are "unfair".
Some of my experience with this comes from hearing the various comments of my (former) fellow Southern Californian golfers when they would play Rustic Canyon paired with me, and over time I concluded that while the architecture there appealed to many people, most weren't quite sure why (not that they cared) but they'd always say something like "this is so different than everything else".
While that statement is true, I'm left to wonder what is included in that "different" statement that pertains to architecture in a positive way...not for Rustic Canyon, just for any course - what is the limit on how much good architecture JQP can handle?
Part of Rustic's perceived success (and I say perceived because I have no idea what the books look like...but it's busy) is certainly it's value, but the complaints about it are often in line with what I said JQP WILL pay for (poor conditioning, lackluster clubhouse) and causes me to question whether the positive attributes in architecture would be enough to help drive success.
And even if it did, would JQP know why?