I don't see how is selling a service different then selling a product ? If clients want it => pay for it.

The real point that privacy advocates REFUSE to talk about is that FREE service wins over 99% market share over PAID service. So people does not want to pay for Facebook (greed) and Facebook does not want to make people pay (market share first in Silicon Valley mindset).

Well money for its thousand engineers has to be found ¯\_(ツ)_/¯

Now that the actors have collectively chosen the combo free services in exchange for private data, a small minority wants free service in exchange of nothing. How does it work, Freemium, government subsidies ?