There was a huge shortage of GLEX pilots a couple of years ago and salaries reflected this. Unlike the GV which had a glut.
Now i am not so sure where we are.
One thing that seems not to have changed is that no-one will stump the cost of the rating. Both are very expensive ratings but still a drop in the ocean when compared to the overall cost of having such an aircraft.
The bargain hunters are still out there!