Righthaven didn't go after any sites that were registered with DMCA. It provides a Safe Harbor to the website, as long as the owner posts the contact info and yanks the copyright content when asked. Bob be safe from that baloney now, because he sent in the $105.
What the Righthaven jokers did was just Google on sentences from the newspaper articles. If they found a part of the article somewhere, they checked for the DMCA, and if there wasn't one, they bought part of the copyright from the newspaper and cranked out a lawsuit. They thought they found a loophole to make $$$ by scaring people into settling. Now they're in deep doo-doo.
Anyway, congrats on the survival of Ribithaven.