They don't add nofollow on all links: http://meta.stackexchange.com/questions/111279/remove-nofollow-on-links-deemed-reputable http://meta.stackexchange.com/qu

They don't add nofollow on all links: http://meta.stackexchange.com/questions/111279/remove-nofollow-on-links-deemed-reputable http://meta.stackexchange.com/questions/111279/remove-nofoll... ("Starting today we will be removing nofollow on links within posts that hit a high enough threshold to be considered reputable. The details will remain somewhat vague at the moment to discourage gaming of this feature.")