I think eventually most of it will leak. Such is the nature of things. Eventually she will stop making content, things will come down in price, and getting banned won't matter because there is nothing else coming out in the future.
KTSO is a strange one. Honestly, I would probably pay a lot per zipset, but the arduous prerequisite system is just insulting.
How many people keep up? It honestly can't be that many. Maybe a few hundred (and probably less). I find it hard to see this as overall a good business decision. What's better. A few thousand bucks a hundred times, or a few hundred bucks thousands of times?