“Our Fundamental Principles

Librivox is a non-commercial, non-profit and ad-free project

Librivox donates its recordings to the public domain

Librivox is powered by volunteers

Librivox maintains a loose and open structure

Librivox welcomes all volunteers from across the globe, in all languages” (https://librivox.org/pages/about-librivox/)

this is a fantastic example of a trade-free service. 5/5 blocks for that project!