A platform where users can control their own data completely and will never be subject to data mining or targeted advertisement.
Facebook and the like will always be around and they have their place, but many people don't want to be at the mercy of a for-profit organization when it comes to what happens to their personal info. The specter of targeted ads and data mining just don't appeal to a lot of people.
If the model was more open-source and not-for-profit, then you don't have to try to balance user privacy vs. company profit.
why isn't there simply a decentralized for profit social network, where your data is stored on your personal web hosting