I don't know how these are sleaze emails. These are marketing emails. If you are using a free version of something, they will try to push you to a paid or enterprise version. I bought an iPhone but still get emails from them to get the Apple TV or the Apple News or the Apple Card service. How is this any different.
Most companies outright lie and try to trick paying customers into thinking the mails they send is personal and not mass mail? I'm glad I have never met any of these "most companies".