Aeric said:I remember seeing ads for phone sex numbers on television, too. It was nuts.
They even made a horror movie based on it: 976-EVIL. It actually made it to the theaters, too.
Ads for phone sex 900 numbers still exist. Turn on the USA channel between midnight and 4 AM and you'll see one eventually.
Also, IIRC, 976-EVIL also spawned a sequel, 976-EVIL 2.