And Facebook’s size may be no defense against ultimate demise; it wasn’t all that long ago the MySpace was the largest social network, and the experience of social news site Digg—once valued at $100 million but sold recently for just 5% of that —is a cautionary tale. Last year it stopped sharing tweet data with Google (bad for the SEO results of Twitter users) and more recently the company eliminated the ability to automatically share tweets on LinkedIn. Imagine that you walk into a restaurant and there’s no one there to take your order. Twice. Facebook. Google.