"
Freefone is a public courtesy telephone and digital video advertising system with a full range of motion and sound. Freefone allows users to make free local and toll free calls. Advertisements appear in a continuous loop, with the sound muted during phone conversations."
There used to be a company that provided free calls to everybody willing to listen to a short ad before the call. They went belly up in about a year.
Earlier:Advertising on Calling Cards