I looked at this both from a coach's point of view and a tournament director' perspective.
In the early to mid-90s when I was coaching, finding out where the tournaments were was a major chore. You had to find someone to help you and then you had to get phone numbers, make calls, etc and most of the events were from Columbus north and east of I-70. The only event I can remember in Southeast Ohio was Sluggerfest and that had just started. It really took some caring coaches and parents to make it work and that is still true today.
With the advent of the web in late 90s and then OFC coming on line and then fastpitch in the Olympics, fast pitch really boomed. OFC greatly facilitated the communication among those fast pitch fanatics and with its tournament listing it made that info readily available to the masses. I know that my days as a TD, I would read the posts to keep up on what the teams wanted/did not want in the way of tournament experiences and tried to match those expectations. Heck, I still read OFC every day to keep up.
So overall, while there are many factors, I'd have to go with OFC as the main impact--with OFC lots of knowledge about the sport became available that otherwise would be difficult to find. My hats off to all those involved/who were involved--Ricky, Jean, Jim Clark, etc. A great big thanks to all of you.