Microsoft is about to shut off its ebook DRM servers: "The books will stop working" https://boingboing.net/2019/06/28/jun-17-2004.html
I'm trader of used ideas. Large selection
Pardon my french (Latin: I'm sorry for my english).
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko