Oh lordy this so much this. As a holder of a beloved 5 character gmail address that is a common first and last name let me tell you that the misdirected email I receive is insane and countless. Services with an reputable unsubscribe get unsubbed and then I moved on. Services with no way to unsubscribe get marked spam each and every single time. Services that do that are effectively dead to me because if they ever do send a legit email gmail will automatically flag and remove them for me and I can't help but believe (with some insider knowledge) that this also impacts deliverability to other gmail accounts.