"Microsoft started out selling software and they still sell software. They haven't changed at all!" "Facebook started with a social network and they're still a

"Microsoft started out selling software and they still sell software. They haven't changed at all!" "Facebook started with a social network and they're still a social network! They haven't changed at all!" You're completely missing the point. You can do the same or similar things while starting with a small audience and scaling. Target a small pool to get product/market fit and gradually expand your target audience until you're a billion dollar company.