I think the expense is just too great.
Back in the early days the goal was to put on the US and British Open course every year and thrown another on the table as well.
The issue with the licensing of one of the British Open courses was the first shoe that dropped and then a few with the US Open courses (Oakmont in particular).
I don't think we will see any additional courses outside the US. I'm okay with that as long as we get at least 2 new courses each year.