It also depends on how do you use that mailbox for. In my case, Gmail doesn't get to see anything related to my professional life. I have another email provider for more serious conversations like that. For the most part, Gmail gets to see a bunch of mailing list junk I never subscribed to. I also use Gmail to logging into various services I don't really care that much about. Nothing important, nothing serious. If it involves money in any way, Gmail doesn't get to read those communications.

However, I am tempted to move all my serious email communications to a more serious paid service. There might be immediate practical benefits too. I could set up a dedicated email address for each creepy company and that way I would find out which one sold my data to spammers.