rich american families
who had multiple phone lines
(
rob,
Mon 10 May 2021, 15:55,
archived)
and calling plans
so that they paid a flat fee, not per-call, which is why they could get away with dialling a million numbers a day without worrying about the phone bill
(
JustHere4Coffee remembers when all o' this were car parks,
Tue 11 May 2021, 2:13,
archived)