A Ferengi paywall
A paywall was a fee levied in order to grant one access to a feature of a device or program.
During a travel guide duty on Ferenginar, Brad Boimler inspected the paywall machine in his hotel room, which he described as "machine that charges you to pay for the toilet and the minibar". (LD: "Parth Ferengi's Heart Place")
In 2381, the Ferengi Genesis Device Nick Locarno owned made use of a two latinum bar paywall if one wished to stop its detonation, much to Locarno's dismay. (LD: "Old Friends, New Planets")