With all the calling plans there are most people have so much L/D time, why would you need an Fx?
Years ago on my old Apple II BBS I had a line into it that was local to users calling into it from San Bernardino, it was forwarded to my BBS line. I was not that costly, before deregulation, it was a flat fee. I did away with it after a few years since most of the users were just using the regular number.
One day I might even put it back up, still have in on the old computer.
Aw the old days before The Internet and Spam, and a regulated utility before Joe's Screen door and Telephone Co.