So, two points. First, I think facebook's global revenue per user is $30. US should be much higher. My back-of the envelope has it @ $225 per year currently ($

So, two points. First, I think facebook's global revenue per user is $30. US should be much higher. My back-of the envelope has it @ $225 per year currently ($43bn revenue from 190m users)... I may be wrong. Don't hurt me. Second, they make $225 (or $30) per user while also maintaining a very high number of users. You can't expect to put up a paywall and not lose users. So, to reach parity, you need to charge enough for subs to replace those. For FB, it's flat impossible. That's why I picked it as an example. You cannot have 190 million americans as paying users at any price. You definitely can't have that many @ $20 per month.