Another idea for a federated service. Shopping network. Each account is a possible seller and/or buyer. Each instance is a shop. Anybody can search for goods on any instance. Buyers can follow sellers for goods updates. Buyers could follow other buyers for goods reviews.
@lig Is there anything to stop us doing this anyway ? I
Pixelfed uk supports a link to Liberapay but having added the link not sure if it has worked as I can't find the link on my profile.