Sure, but you can usually register with fake info though. I’ve never seen one really verify much of any information.
Just use one of those email forwarding services that generates unique addresses.
everyone can sign up as “JP Morgan” at “555 Fuckoff Lane”. I’m guessing it might be better if we all standardize to make it harder to connect the sold datasets. If they have address checking we should find some tiny town with 200 people from google maps.
Yes-- same with bluetooth or ordering groceries for delivery and giving your home address. There’s always ways to leak data and make it no longer anonymous. However, from my knowledge of how some of these datasets work, they aren’t putting in a lot of effort into truly trying to make sure the joins are 100% accurate because it rarely matters. They generally don’t give a shit about you as an individual. The most common uses of the data are for advertising and mistargeting doesn’t cost enough to justify the time to verify the data.
Paying in cash though can make it anonymous, or by using virtual cards that mask your card id.