Earlier quoted context omitted.
The failure is that start up founders and investors fail to recognize that revenue is your KPI to optimize for in the long run, with a goal of making a profit in the not so distant future. Business is not a social network, and success isn't measured by how many friends/users/downloads you have. Money is the bottom line. Of course if you give something away for free or sell it cheap enough at a loss, you'll get a lot…
What if your business model were to get a huge investment from some rich friends, give away free tacos, put all the other taco stands in your town out of business, become a taco stand monopoly, and then charge for tacos at any price you want?
See Uber vs Lyft.
You'd be better off investing in a real business with a real revenue plan. Still, yes, your model works in an environment where collusion can take place. Which is why collusion and the VC aristocracy is so damaging.