A little late on the reply... This is a brand new ruling. Indeed, I'm not sure a lot of legal people thought SSO of apis was a copyrightable artifact. Otherw

A little late on the reply... This is a brand new ruling. Indeed, I'm not sure a lot of legal people thought SSO of apis was a copyrightable artifact. Otherwise, it's likely that a lot of stuff wouldn't have been created in the same way (Google's work on dalvik, all of the "aws compatiable api" cloud tools, etc). The key thing here is that even though they ruling is saying that SSO is copyrightable, that still means the normal defenses against copyright infringement are still available (ex: fair use). It also means that re-implementing a clean room compatible implementation of an API could still mean licensing fees, and thus less interoperability. Think about open source software that implements a compatibility layer to interoperate with a closed source API. Just copying that SSO could be infringement, and thus some people are likely going to be less interested in creating that software if there are possible legal repercussions.