Perhaps they've finally made it illegal, but I remember plenty of complaints from people about 800 numbers that were scams that charged to your phone bill when you called them, even if accidental. I remember being surprised at the time because I thought all 800 numbers were free by design.
Good point. To be honest, this was about ~20 years ago and I don't remember the exact phone number. Might have been a 900 number. Either way, the phone number was being primarily marketed towards children who probably didn't know that the calls would cost money.