On an unrelated note, that makes me think, why facebook won't make a paid subscription version? I would dearly pay 10-20 bucks per year or whatever they are getting from me and never see ads or get my data shared with advertisers.

Then the people who didn't pay would feel as second-class citizens who can be scrutinized, analyzed, and their profiles sold. That awareness would be deadly for Facebook, because not enough people would be willing to pay.

Advertisers only really care about showing ads to people with enough money to buy their products. An ad-free subscription lets these people remove themselves from the consumer pool, drastically reducing the value of their advertising product. Why take the chance of disrupting a system that's working for them?