[tomputer]

Same here in the Netherlands, somewhere between 1998-1999 using KPN Telecom. I was in high school and convinced my parents to upgrade from single-line PSTN to dual-line ISDN, so we could call and surf the internet at the same time. At the start of 1999, because of the rapid increase in phone and internet traffic, the national call tariffs had been reduced a lot[1]. Tariffs were even cheaper in the afternoon and during the weekend.

For normal internet browsing the single ISDN connection (64 kbps) was enough. Then later in 1999, Napster[2] launched and I was hooked! This made me use bundling ISDN channels quite a lot. Because of the cheaper tariffs, weekends where great because I enabled the bundling around midnight until early in the morning, so my parents wouldn't notice. :-)

I was on ISDN until 2002, when ADSL was available here and we could be online 24/7 for a fixed price. I do remember my ISP (XS4ALL) still had a fair-use-policy for downloading, which they removed a few years later.

[1] https://www.acm.nl/en/publications/publication/9213/OPTA-agr...

[2] https://en.wikipedia.org/wiki/Napster