Services accessed via certain telephone numbers incur charges significantly higher than standard calling rates. Callers typically pay a per-minute fee, or a flat charge for the call, a portion of which is then remitted to the service provider. Examples include helplines, entertainment services, and voting lines.
Such services have a long history, providing businesses with a mechanism to monetize information or entertainment delivered over the telephone network. They offer convenience and immediate access to a variety of services, but also necessitate transparency in pricing and regulation to prevent abuse and ensure consumer protection. Their use is especially valuable for time-sensitive applications and large-scale participation events.