[Suppafly]

>Connectivity was provided in partnership with established network companies, with Concentric Network Corp effectively offering a turnkey ISP service, and UltraStar handling the business and marketing side of things.

Near the end of the dialup ISP era, I remember that several of the free and cheap ISPs all surprisingly had the same bank of phone numbers. I always suspected there was some service that just managed everything for them.

[rasz]

In US at least most likely operating using free money glitch - Reciprocal Compensation

https://www.youtube.com/watch?v=ympjaibY6to&t=3725s