And somehow, Twitter, Groupon, Instagram etc., have not yet figured out how to actually make money off of those 2 BILLION PEOPLE. And last time I checked, making money was the whole point of investing.

Edit: Just to clarify the above, making money == making a profit. I think that's pretty well understood in business, guys. If I bought a single share of stock for $100, and sold it for $50, I sure as hell did not "make money" on the deal, even though I gained $50 in revenue from selling the stock.

Actually Twitter and Groupon both make a lot of money off those people. Revenue != profit. Groupon is spending a ton of money moving into new markets. Now, I don't love Groupon but saying they don't make money is just wrong.

"To make money" means to make a profit, not generate revenue.