Keeping in mind this has remained a mystery to me ever since Facebook didn't sell for a million dollars an eon ago. Facebook's founder is today worth some ridiculous sum of money. Why is that? I'd have sold Facebook for a million dollars and then just made another website. What am I missing. YouTube sold for some amazing sum ages ago to Google, who has from my understanding still not turned a profit with it.
Since I am clearly so out of touch please make the explanation easy to understand.