There's a pretty healthy regulatory environment around it, though I have noticed a resurgence of opt-out marketing communications on signup forms, which is unwelcome (I don't know if some legal decision changed, but it seemed like for a while this was not allowed, and maybe something has made companies think that it is again).

(I decided to look it up, here's the UK rules: https://ico.org.uk/for-organisations/direct-marketing-and-pr... . It looks like it is allowed to be opt-out if you buy something from them, which I do dislike, but there are rules and the ICO does have teeth)