I’ve had Norton on my laptops & Android phones for years. To be honest I don’t think I’ve ever had any of the sort of unsolicited sales communications you indicate.
It seems to just sit there, scan regularly and update itself without any interaction from me. It occasionally notified me that it has blocked access to a ‘dangerous’ site, usually when from a link in something else. So it seems to just do what it’s supposed to.
There have been previous recent topics about the usefulness of 3rd party products like Norton so won’t go over old ground.
Mike