Musk talks about how PayPal is a perfect case of viral marketing where one customer acts as a sales person by sending money to a friend and hence recruiting another customer. By the end of the second year, PayPal had a million customers with no sales force and no advertising budget, he says.
Related

Lisa Alderson,
Genome Medical
Dare to Stretch Your Boundaries [Entire Talk]
Get out of your comfort zone and learn to be adaptable. Breakthroughs don't come from doing what you've always done.
Video
56 minutes
Lisa Alderson,
Genome Medical
Dare to Stretch Your Boundaries [Entire Talk]
Get out of your comfort zone and learn to be adaptable. Breakthroughs don't come from doing what you've always done.

Gabriel Parisi-Amon,
Nebia Shower
A Burnout Manifesto [Entire Talk]
Allow yourself to pause work so you can reflect and decompress. The source of protection from burnout is grounded in your values.
Video
53 minutes
Gabriel Parisi-Amon,
Nebia Shower
A Burnout Manifesto [Entire Talk]
Allow yourself to pause work so you can reflect and decompress. The source of protection from burnout is grounded in your values.

Tracy Chou,
Project Include
Debugging the Brogrammer Culture [Entire Talk]
Constantly ask yourself, 'Who's not in the room?" Championing diversity in tech will result in a more inclusive culture and better products.
Video
57 minutes
Tracy Chou,
Project Include
Debugging the Brogrammer Culture [Entire Talk]
Constantly ask yourself, 'Who's not in the room?" Championing diversity in tech will result in a more inclusive culture and better products.