TLDR: While Fediverse won’t directly serve you ads, anonymous bad actors other than Meta can save, redistribute, and even dox you for any information you post here. Anything you post here can/will remain forever on some malicious instance that doesn’t honor deletion requests. So be careful!
I think this is so disingenuous. There’s such a huge difference between being actively tracked and monetized in ways that are explicitly hidden from you vs all of your posts being intrinsically public and cached. To act like the first is fine and the second is risky is just big tech propaganda.