So to be equal parts self-indulgent and topical:
I started an "advanced certificate" in programming at a technical college in 1990 or 1991, which pre-dates the public internet by several years. One of the other students recommended I join a local "bulletin board system" (called "1990 Multiline") so I could download resources as they received shipments of CDs and/or floppy disks and put them up on the board. Yes, I had to wait for physical media to be transported via ship/air until I could access it.
We all connected by modems (think screeching fax) so everyone was calling via a local call to connect. The BBS had to have a physical receiving modem for each inbound call and I think at the time of joining they had 12 lines. So 12 (local) people could connect at any one time. The 13th person would get a busy tone and have to redial again later (or those who were obsessed, redial constantly).
Anyway, I quickly discovered a whole bunch of other resources, such as chat, MUDs and a roleplay section. Think screens
such as these. It was all "press 1" or "press A" to select what you were doing, possibly some fancy arrow key navigation. The RP section had character sheets, a cast list, messages (no groups though) and 1-1 messaging. That was about it but hey it was an upgrade from the rocks we were bashing together beforehand.
By the time I gave it up and migrated to plain old internet (which at the time was shiny new internet) they had maybe 60 lines but it was still using the same technology. The internet far surpassed BB systems and 1990 eventually faltered before completely collapsing.
The story of RPoL is that sometime in around 1999/2000 I was contacted by Skald to say that 1990 Multiline was closing and the games needed a new home. He'd looked around in the internet and though it was slim pickings he'd discovered PlayByWeb. Skald asked if I'd like to rejoin the action and also what did I think of PBW and did I know anywhere better. I wasn't a fan but it was the best available. I could do better, I declared, and then after brief contemplation decided that I should prove it.
So after some hacking around RPoL was released toward the end of 2000.