@ CressidaHubris
I initially reached out to a small group of authors/developers and asked for permission to host their games on Yarn. Once I finish building the authoring tool and self-publishing platform, anyone will be able to upload their game to Yarn’s catalog. In the meantime, I have to do all the conversion myself. It can be pretty time consuming so unfortunately, at the moment I have to be picky-choosy with what I convert and publish. (Shameless Plug: anyone currently interested in publishing on Yarn can submit their work here: https://writers.useyarn.com)
Allowing readers to upload their own favorite games to their private library is a cool idea for a feature though. I made a note of it on my todo list.