First: they're just as entitled to deny service to anyone doing this kind of stuff (ad blocking or privacy-enhancing features) as anyone is to using it. The fac

First: they're just as entitled to deny service to anyone doing this kind of stuff (ad blocking or privacy-enhancing features) as anyone is to using it. The fact that they aren't means they're still gaining some value even with users doing this. Second: I don't think these features actually do anything to prevent tracking anyway. It might take some effort to validate, but my assumption is that Facebook is capable of building the link unique to the user who shared, and even potentially specific to the recipient if their sharing via DM. In the second case, these will be unique enough to easily track the users who open them, specifically by tying the IP of the recipient when they browse, even with other privacy-blockers running. The only way around that would be VPN, presumably. Granted, there's still some data tracking getting broken in these situations, as every link is being interacted with automatically by AdNauseum, but they could still track situations where links are interacted with multiple times, for example.