Leonard recorded her own voice informing callers of the contents of the next issue of High Society magazine before its publication.

Later she recorded others such as Annie Sprinkle "talking sexy".

Nevertheless, phone sex should not be confused with prostitution wherein money is exchanged for real life sexual services or physical interaction.

The editor of High Society magazine, Gloria Leonard, is credited with being one of the first people to use "976 numbers", then "900 numbers" for promotional purposes and soon as a revenue stream in the adult industry.

The incentives for providers were then reversed; rather than earning money from keeping the customer on the line (orgasm delayed), they earned more from bringing the caller to orgasm quickly, so as to move on rapidly to another call.

Unused minutes were rarely usable on a second call.

Originally, per-minute billing was provided by phone companies (in the U. There was, from some services, an attempt to keep the caller aroused but short of orgasm, so he would spend more money.

(This attitude still survives among some providers.) When public (mostly female) pressure forced the phone companies to stop providing this service to sex workers, a transition was made to a manual method: pre-paid blocks of time, 10, 30, 60 minutes, whatever the customer would pay for.The provider provided (say) 10 minutes of service, but got to keep all of the money (say 20 minutes).When the Internet got relatively mature, sale of any sexual service not involving a minor could be made to anyone not a minor.If a customer disputed a charge, the telephone company would usually “forgive” the charge but block the caller from calling any other chat lines.By 2007 only Verizon, Sprint and AT&T remained in the chat line business in the U. By 2007 Verizon and MCI had merged and only a few chat line companies remained active as a result.The vast majority of modern services in the United States use toll-free numbers whereby clients can dial up to request a call with a particular performer using credit cards, Automated Clearing House systems, and a variety of other billing methods.