[nl]

GoPro's most effective marketing isn't traditional paid advertising, it's the cool video your friend shot & put on YouTube.

Or if you don't have any cool friends, it's Jeb Corliss' "Grinding the Crack"[1]. Given that many credit the massive success[2] of AWOLNATION's "Sail" (the soundtrack to that clip) to the 26M views that clip has had, I wonder how many GoPro's it sold, too?

[1] https://www.youtube.com/watch?v=TWfph3iNC-k

[2] http://en.wikipedia.org/wiki/Sail_(song) (Note that it entered the Billboad 100 a month after "Grinding the Crack" went viral)