It is the natural cycle of a sportscar class (I made this up).
1) Class begins with simple cars.
2) Car numbers greatly increase.
3) Manufacturers get interested, start joining. (In this case, the demise of GT1 lead to more manufacturers in GT2)
4) Competition increases, development increases, costs increase.
5) Teams/cars begin to leave.
6) DEATH
Right now, GTE is somewhere between step 3 and 5. We have seen many cars leave (Spyker, Jaguar, Ford) but also many join (Aston Martin, Lotus, Dodge). There is still interest but the rules need to be addressed in order to help teams a little and reduce costs.
Think of it as our duty to keep this thread at the top of the thread list and not in the waste land known as "page 2".
Plus, I like talking to The Badger.