1. Variety drops pay wall in what it calls “end of an error” (PaidContent.com)

2. NASCAR explains the blocking of fan video after wreck (Washington Post)

3. Breeding unicorns and building off others: A wrap-up of the Journalism Interactive conference (Nieman)

4. How do you grow a Twitter following? Be nice and informative (Forbes)

5. Why you should and shouldn’t be worried about the new ‘six strikes’ anti-piracy rules (GigaOm)