Depends.. many types of list maintainers are very bad abusers, political list, charity lists come to mind. You get unsubscribed from that "list" your email gets

Depends.. many types of list maintainers are very bad abusers, political list, charity lists come to mind. You get unsubscribed from that "list" your email gets sold on to multiple lists, also a response or worse a purchase via the mail like this makes yours email higher value.