Step 1: Build a social networking application built on someone else's platform. Step 2: Spend lots of someone else's money to acquire users. Step 3: ??? Step

Step 1: Build a social networking application built on someone else's platform. Step 2: Spend lots of someone else's money to acquire users. Step 3: ??? Step 4: Get acquired by a larger company. Still not profitable, but your founders and investors walk away with bank.