[Teever]

Can I pay to opt out of their internet (real world?) wide tracking too?

Or better, can I just not pay for that and have them not do that?

[grishka]

You can disable third-party cookies and install a good ad blocker in your browsers to make tracking not 100% impossible, but much harder.

[Teever]

Facebook recommended my sister to a friend soon after visiting my friend that I hadn't visited in years.

Is there any way to get them to not do that kind of shit too?

[skrause]

You can with uBlock Origin and Fanboy's Anti-Facebook Filters: https://www.fanboy.co.nz/