I went around and around with support to get opted out of Stripe Capital spam emails (they claimed to opt me out, but I kept receiving emails about Stripe Capital), and in the process they broke my notification preferences causing me to get a daily batch email. When asked to undo the damage support referred me to a beta setting in the Stripe website IIRC.

Overall, terrible experience.

FYI, you need to start including unsubscribe links in your emails to be CAN-SPAM Act compliant.