In the last 5 years, I've only heard of PurpleVRS, Sorenson, and ZVRS. I'e never heard of the others... NEVER.
SprintVRS? I only remember SprintRelay (online relay service like IP-Relay).
You just made my point I was trying to make..... many never heard of the other VRS's. lack of media, advertising, etc.
The other vrs's were under the main ones you knew but FCC doesnt allow that anymore. There has been many many changes made that many dont know about.