Most complaints are about intrusive advertising. Product management, customer analysis, demand and financial modeling, and all similar aspects of market making is what marketing traditionally is.
Advertising and promotions is a small component that tars the broader industry.
Consumer profiling is a large component that tars the entire industry.
I suspect there are only few companies that manage the contact lists and they are now careful not to overstep the law.
On the other hand, scam calls from abroad started to appear (sir-your-computer-has-a-virus type).
I've been using fake names and emails for some accounts online and somehow I recently received physical spam mail with one of those names without ever sharing my address.
Might or might not be relevant that we sell products for a niche, technical industry.
It's really sad too, because these sites know that you clicked on them from a sea of similar looking results, and this signup form is the only way you're likely to even remember their existence.