Cold Start Problem by Andrew Chen

Nintendo, Xbox, Sony - all set-up a few games, in a way, flintstoning, to gear up the product launch. Launch exclusive games built within the company, build a network - then let third party players jump on to the network.

Consumers will find unexpected use cases for your product/service - sometimes, might pull it into a grey area.

Often, it is the power users that know how well the product or the service works - not just because of the time they have spent using the product but also because the growth team targets and nudges the user with features that will make this user stay on the product longer.