Props to Justin. This guy carries himself like a true startup veteran despite being only 28 years old. He has a level of tenacity that will make him succeed 9/10 times regardless of the idea, that's what differentiates Justin from rest of the wantrapreneurs.
Startup stories where things don't go as planned but the founders find a way to persevere anyway (like Justin.TV) are way more inspiring to me as an entrepreneur than the overnight successes of companies like Instagram, etc.
Kevin Systrom interned at a couple of high profile startup pre-Burbn too. Pinterest had a product called Tote before Pinterest so theres a not insignificant time of preconditioning there too.