They put cameras on the helmets? good enough to file an IPO...
Check out their YouTube channel for examples of what their customers do with their cameras. It's pretty amazing.
They're selling a somewhat specialized camera to a huge potential market, making billions of dollars.
It's a far more promising business plan than 99% of the startups I see mentioned on HN.
http://techcrunch.com/2014/02/07/gopro-files-for-ipo-as-the-...