[aidenn0]

Advertising is all about manipulating people. Furthermore successful advertising is all about making the perceived voluntary cost to the user smaller than the perceived value to the advertiser. If you took Facebook's revenue and divided it by the number of users, I'm guessing they would lose a lot of customers by charging that amount as a subscription fee.

If you don't advertise, you need to charge money.

If you charge money, and a competitor launches with successful advertising, then you will go out of business since the perceived cost for their users is lower than what you need to charge to stay in business.