It is not true that Facebook makes its money by selling private data, as you can verify by reading its publicly available earnings reports. It makes its money by selling ads, which it uses private data to target — a completely different thing.
Facebook does not make its money from “selling data” at all, whether “private data” or “privacy-sensitive data”.
The audience size tricks like uploading an audience, then adding one to it and reuploading won’t work. There’s a cardinality fudging thing.
[0] https://ghostinfluence.com/the-ultimate-retaliation-pranking...
Genuinely not understanding something is fine. Already claiming someone was intellectually dishonest because you misread or misunderstood not so much.
The ads business of Facebook is based on the very specific data Facebook can provide their advertisers for very specific target audiences based on private information they gathered through their platform. Like ads for people who die their hair, have an affliction for cheese burgers, are right wing and live in zip code 20500. That is privacy sensitive information (although I picked a public person for this example). They do not provide customers with Trump's private number. That would be private data. They do not just sell ads on their platform, they sell specific target audiences on their platform.
Again, no it isn’t. Facebook at no point provides data to its advertisers.
Yes, advertisers can say “show this ad to people who are right-wing and live in DC” (although I doubt “dyed hair” is a category). However, the advertisers are never provided with any data about who is in that category. That data never leaves Facebook.
So criticizing Facebook for the latter (which it doesn’t actually do) is intellectually dishonest.
This is sort of similar to how content owners have muddied the waters of debate by calling copyright infringement stealing. One can certainly argue that both are unethical, but they’re still different things!