I don't know why anyone joins a club when it is so much easier to write a blog or become a magazine rater. Funny thing how the popularity of blogs and expansion of rater panels all coincided with the demise of golf. The internet has made it hard to join anything when you are already a part of everything.
John,
On a personal level I would argue that you're dead wrong. Being a rater and "visiting" clubs is a large catalyst behind my researching and pursuing a membership. I always felt like a visitor--though happy to be there--and wanted a "home".
I have also had many conversations that centered around the idea that traveling to courses as a rater eats up any expendable income one might have to join a club. After airfare, hotels, food, green fees, caddies, etc., it's not cheap to travel to rate courses. Most do it because they love it and feel strongly about how the lists affect golf architecture.
I do think you're onto something with your quote above in relation to how many
raters are becoming new members at clubs. Not many I'd assume. New models like the Outpost Club also effect the bottom line as well.
In the end, this question becomes a measure of feasibility. Though we happen to have many of them on this website, folks that pay 5 figures to join a place they visit a handful of times per year are tough to find right now.