Ed,
Doesn't the difficulty and expense of getting to where the course is figure in this somehow? I don't know where you live, but even if you don't live in California most of us who live in the US will find ourselves there for business, visiting friends or just vacationing more than a few times in our lives, so there are plenty of opportunities to play Pebble. However, since its "free" or nearly so to get there since we are already there for other reasons, spending $700 or whatever it is to stay in the Lodge for a night and play Pebble sounds pretty steep, so I've never played it -- though perhaps more because I haven't been there with better golfers who could appreciate it. No way would it be worth it for a 100+ shooter unless he's got too many dollars or not enough sense.
If I think about Old Head, I could see playing it next time I'm in Ireland on a golf trip because I'm already spending thousands on the trip anyway, what's another few hundred?
That'd be even more true with Cape Kidnappers if I was on a golf trip to AU/NZ, since its even more expensive to get there, though its apparently in a fairly remote location as well so it seems like it'd take Machrahanish-like desire to make it happen. I doubt I'll ever play CK, not due to the price but simply because when I finally visit that part of the world I'm not going to be visiting for the golf, and I don't bring my clubs when I'm not on a golf trip. Too much hassle for just getting in one or two rounds!