Pebble Beach was only open for a short time period as a CTTH / Blitz game. It should open as a full 18 hole course when the next US Open is played there, you can look and see the next 5 or 6 US Open courses on the WGT website.
I have no idea why the CTTH on Pebble Beach, closed, I think there were 3 of these and they were great fun, might be a contractual thing with the USGA.
I would like to see WGT go a different way in the future, if you go 5 years out, we will end up with 7 Open Courses, Kiawah and the 8 US Open Courses. While the US Open courses tend to be pretty different, the Open (British) courses do tend to look a lot alike and play that way. I realize the cost is extreme to go to Australia and pick up Royal Melbourne but it would be nice to throw in Harbour Town, Southern Hills, etc. to give us a little variety.