I have also found they are very sneaky about turning settings back on by berating the user with message boxes over time, answering a dingle one wrong turns it all back on.
Android location data collection does this, for example.
Yeah, it doesn't sound like "opt-in" as much as it actively prompts users. Opt-in would be it's accessible in the settings but not pushed in your face.
And also bcs the opt-in is only the first stage when there are articles about the change, in a few months it will be opt-out (and called opt out of enhanced privacy which will also be a lie).
I'm just saying it's opt-in, which it definitely is. It's not "sneaky" if it's literally clearly out in the open. They're not "lying" and they are conforming to EU law which is quite strict on this topic.
You are choosing to accept their terms of service, and if you don't like them, just use a different browser??