Mosaic, the first graphical browser was developed by National Center for Supercomputing Applications. They were of course not bound by dial-up or similar and probably didn't care for commercial offerings of connectivity in their priorities in development.
And before it, slip had been available and standardized for some time.
I would say what drove the adoption of commercial services was the graphical web, not the other way around.
I think the point I would want to make is the commercial availability of IP addresses drove the graphical browser adoption.
I read about graphical browsers in MacWeek in an article about SoundWire. This was a website that was selling music on the web. I believe fulfillment was through snailmail. There headquarters were in a Brooklyn apartment. I somehow contacted the owner (Joe a friend of Dang) and took the subway to his apartment to see a graphical browser in action. I don't know how long it took to actually get my own IP address but I know it took me a few days to get a MacPPP connection to actually work over slip.
That implies that you got on the bandwagon because it was a graphical web? At my department in Sweden it was an overnight adoption when we found Mosaic.
And I can see you struggle to get PPP to work over slip!
Prior to the Mosaic I thought Gopher was superior to a text based WWW. Once ISDN became available I used an Ascend Pipeline 50 and that made IP addresses available across an entire network. The office I was working at also immediately adopted Mosaic/Netscape at that time. Getting PPP to work was definitely heavy lifting for me. Getting an IP address as an individual was difficult in the early days.
And before it, slip had been available and standardized for some time.
I would say what drove the adoption of commercial services was the graphical web, not the other way around.