For EU-citizens, any legal data collection would have to be opt-in, right? If I've had no business with any of these companies, there should be no reason for me to have to opt-out.
For a short period of time I even had a website dedicated to calling them out on their bullshit practices, and went in to their Facebook page and posted the link everytime there were any questions about it.
I even got a threatening takedown email, to which I kindly restated what I had written on the page: that I would not pay postage to Germany to unsubscribe and that the page would go down either when I got an official notice that I was unsubscribed from everything or when I hadn't received any marketing email for 6 months.
In the end I spent much more time than needed to GDPR-request all information they had on me and detailed information how it was used. Only to ask them to remove all of it in the end.
Given the pandemic, plausible economic collapse, Brexit, and so many other things going on in the world right now, I wouldn't hold my breath.