[stonemetal]

> benefit seems limited. Social stuff, sure. Most of us?

Any business where you have a large catalog that users are going to want to filter through. This gives you the ability to offer a shortcut to things they might find interesting. Other examples would be netflix, spotify, app stores, or coursera.

[contingencies]

Basically those are all media discovery applications. (PS. I can't think of a single app store experience worth replicating...)

[stonemetal]

Drop the media part and yeah sounds about right. Anything that has a large enough collection of things to need discovery.