M/tv/phone/pron board question

I'm up late and enjoying uncensored comedy channel stand up specials.
Some old school part of me just enjoys curse words being allowed on normal television.
Anyhow, for those with "yuuge" amounts of income that are above commercials, there are crazy amounts of phone porn. 1-900-Cougars , 1-900-undr18 , 1-900-makethebillsoundlikeasportsbar

It makes me wonder how this is a thing. Phone sex.
There is a plethora of sexy time things available on the Internet (a friend told me). Why call ?

Update: and now there is a vacuum cleaner infomercial. What marketing campaign said "these viewers love comedy, are up late, and have most likely seen porn.... Let's sell them something that sucks up. .." Never mind. Figured it out