I tried to share a link from Windows Reading List, and here is what it gave me: http://tinyurl.com/ob29zg6

Put it into an HTML editor, and you'll see it's the actual code for the Reading List object, with the thumbnail of the webpage. This is definitely not useful behaviour and there's nowhere to be found where I can give feedback to Microsoft that this is designed wrong.

To spare you reading this useless string of text the app actually gives you, here's what the resulting HTML compiles to:

http://tinyurl.com/phrdabf