One way to deal with this I’ve been doing for a little while is to use a service that enables me to use email aliases. It’s mostly meant to avoid email address leaks, but will also make it harder for online services and companies to track you, since it’s a big point of tracking. You can also use it to figure out who sold your email address. Not a perfect solution, but it’s something. I’ve been using Proton. Whether or not you trust them is up to you, but they do offer this ability (I just can’t remember if it’s free or paid).