I dont think you really have to worry about all the OPs shutting down. there is just tooooo much money$$$$$$ to be made this way and I feel someone will always be in the biz wanting to at least take advantage of people ( if not help them ) I am not saying all the OPs are out to take advantage of people , i am sure some care, but the $ sign attached to these operations is just too high for everyone to just quit cause the laws are written that way. People who want $$$ will try to find loopholes to stay in buisness.
I suspect OPs will be around a while.

Tansun