[onewaystreet]

Pinterest is the only one of those companies whose success was close to immediate. Uber, Facebook, Youtube all had to grind it out. Uber battled (and still is) many legal challenges; YouTube almost went the way of Napster early on; and Facebook was an underdog to MySpace for a long time.

[paul9290]

As I recall, Uber was picked up quickly in San Francisco. I recall Mike Arrington raving about it when it first launched. It had instant uptake in tech circles & early adopters.

Facebook was instant in the fact that when launched it took Harvard by storm and then grew like a weed thereafter.