With open angel forum in 12 cities now we might be able to help fund maybe two or three dozen of these accelerators--but not much more.
The good news is that if even only 1 of 50 companies out of a University accelerator is successful--and the other 49 serve as an education--it's still well worth doing.
the goal of these is to inspire and educate--not have the same batting average as YC or TS.
YC/TechStars
OAF
What I described above.
But the fact that the "lesser" schools can't quite give you that same push doesn't mean that they shouldn't exist, or that you might not be helped immensely by going to one of them.
Not sustainable, sure - YC is the elite of elite accelerators, obviously it's going to be extremely difficult to reproduce its success. But there's still room to grow here, and a lot of people going it on their own that can't get into one of the elite accelerators (if I'm correct YC now accepts a vastly smaller percentage of applicants than Yale or Harvard) but would greatly benefit from some funding, advice, and being helped through some of the unfamiliar business dealings while they focused on their products.
Maybe 500 accelerators is a bit much, but I'd imagine that we could certainly do with a few more, unless we've already reached a point where spots are going unfilled...