This is The TechCrunch Exchange, a newsletter that goes out on Saturdays, based on the column of the same name. You can sign up for the email here. It was an active week in the technology world broadly, with big news from Facebook and Twitter and Apple. But past the headline-grabbing noise, there was a steady drumbeat of bullish news for unicorns, or private companies worth $1 billion or more. A bullish week for unicorns The Exchange spent a good chunk of the week looking into different stories from unicorns,…
