Whether they're directly doing business with data brokers or not is not the point. They're indirectly profiting from the profiles they build by selling access to them via their advertising platform. It's just a roundabout way of doing business, as is common in advertising.

Besides, even if they're not selling these profiles, they will end up on data broker markets one way or another. Whether their lack of security allows companies to export it, as in Meta's case, or simply by using their tools to gather as much information about people as possible.

The reality is that nobody outside of these companies, and likely only people in executive positions, knows how they operate internally. They have an army of PR and legal people to do their bidding. Whatever practices the public thinks these companies are or aren't involved with is mere guesswork, but one thing is certain: they don't maintain their size and power by keeping their hands clean. But then again, I'm probably on the wrong forum for this line of thinking.