This plugin is awesome but one thing I've noticed lately is several financial institutions use tracking pixels to verify e-mail addresses and if you don't open an e-mail in a way that loads the pixel once every so often, they drop you from paperless statements.
I've run into this with Capital One and Discover. Every year I have to log in and click "yes I want paperless statements" and then 11 statements later I get one in the mail with a message about "we miss you, you're not opening our e-mails so here's a paper statement unless you tell us you want e-statements and you open our e-mails." Never mind that I log into the mobile apps and web-based account management systems multiple times per month...