A: I get more spam than ever. What is especially annoying is that the majority of reputable companies do this. Order something? Sign up for an account? Set up an LLC? File a trademark? Boom: Spam emails UFN.
B: It's easier to unsubscribe than ever: Often one-click at the bottom of the email, or let Gmail/Fastmail etc do it for you. Generally effective.
One annoyance I find is the Our terms have been altered. Pray I don't alter them further loophole, where you will still get emails after unsubbing.
There's only one company I tolerate marketing emails from (Pitviper sunglasses), and it's because the emails are funny.