How does SANS decide where to host training locations?

in GIAC
I attended SANS training in Philadelphia this year in Feb., SANS offered around 8 courses, I expected the same thing for next year, but no dice, they just have two community events in Philadelphia next year. I was trying to put together a list of venues I would in interesting in facilitating. I was more than a little surprised they are not offering the same event this year, wonder how they determine where to host training events and why they don't repeat them? Attendance? Testing different markets to see what the response is?
Still searching for the corner in a round room.
Comments
My guess is demand is the number 1 choice when they decide which location to host it at. The GCIH class was so popular that they had to open another 2 more classes instead of the original 1 class. I roughly counted around 150 pax for the whole event or even more.
I saw some facilitators too. Is it worth it becoming one ?