The "network effect" lock in is real when your service is free to use. Put a price tag and suddenly it becomes much harder to keep people from leaving. The "gro

The "network effect" lock in is real when your service is free to use. Put a price tag and suddenly it becomes much harder to keep people from leaving. The "growth at all cost" strategy is profitable for facebook & G, for other things, the market will decide what profit margin they can have (if at all)