Turns out that when you ‘share’ a link from Readability, the link that is shared links back to the readability optimized site — not to the original source article. This is both shady and completely at odds with the ‘goodwill’ nature of the web. (Read it Later and Instapaper share links that go back to the source article.) Or as A.T. Faust III put it:
Still, intentional or not, Readability’s current setup is tantamount to content theft, and that’s a problem for everyone involved.