Leonard convinced magazine owner Carl Ruderman to purchase more of these numbers and the business began to be successful using the magazine to promote the service.

Leonard herself was surprised at the success of these numbers.

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.

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.

Software platforms were custom written to handle money collection and transfer, connecting caller and sex worker though neither could see anything but the platform's phone number, and metering the connection.

Details vary significantly from one platform to another, but the provider may be given a personal page on the platform to use however she (sometimes he) wishes.

By the end of the 1980s, nearly all of the major local phone companies in the United States, plus the major long distance carriers, were actively involved in the adult chat line business.

The telephone companies would provide billing services for chat line companies.

Typically the telephone companies would bill callers to chat lines and then remit 45% of the money collected to chat line operators.