As I pointed out a few weeks ago, only three of the top 50 current &quot;unicorns&quot; are ad-supported: Snapchat, Instagram, and Vice Media.  Since then, it&#x27;s come out that Snapchat isn&#x27;t doing too well and their valuation is down; we may be down to two ad-supported unicorns soon.  The current startup boom is not ad-supported.  That&#x27;s a good thing.