Observe, orient, decide, act. It's fighter pilot terminology. If you have the faster OODA loop in a dogfight, you live. The other person dies. In Silicon Valley, the OODA loop of your decision-making is effectively what differentiates your ability to succeed.
MySpace is like a bar, Facebook is like the BBQ you have in your back yard with friends and family, play games, share pictures. Facebook is much better for sharing than MySpace. LinkedIn is the office, how you stay up to date, solve professional problems.
Blitzscaling is always managerially inefficient - and it burns through a lot of capital quickly. But you have to be willing to take on these inefficiencies in order to scale up. That's the opposite of what large organizations optimize for.
Blitzscaling is what you do when you need to grow really, really quickly. It's the science and art of rapidly building out a company to serve a large and usually global market, with the goal of becoming the first mover at scale. This is high-impact entrepreneurship.