All of this nonsense — the attribution appended to copied text, the inline search results popovers — is from a company named Tynt, which bills itself as “The copy/paste company”.
It’s a bunch of user-hostile SEO bullshit.
Everyone knows how copy and paste works. You select text. You copy. When you paste, what you get is exactly what you selected. The core product of the “copy/paste company” is a service that breaks copy and paste.
The pitch from Tynt to publishers is that their clipboard jiggery-pokery allows publishers to track where text copied from their website is being used, on the assumption that whoever is pasting the text is leaving the Tynt-inserted attribution URL, with its gibberish-looking tracking ID. This is, I believe, a dubious assumption. Who, when they paste such text and find this “Read more:” attribution line appended, doesn’t just delete it (and wonder how it got there)?
Praise be. There’s also a link to a Google Chrome Tynt blocker plugin, and some other solutions, including how to edit your hosts file.
I’m finding myself at Daring Fireball pretty regularly these days, with a growing amount of respect for Gruber.