Eh, many of the startups now are selling services for less than you'd pay for, with the difference subsidized by VCs. Granted, some services have close to zero costs, but one can also argues that many of them have close to zero values too. There will always be a few winners and a lot of losers in any periods. The last bubble brought us Amazon, Google, ebay, etc. I am sure some of the current unicorns will become big household names, but many others will fade away.