Sweet Paprika Designs review for Mailchimp Email SMS Marketing

I've had this app installed for a while and for the most part it seems to work fine, but after reading some reviews today about customers being unsubscribed if they don't check the "accept marketing" box at checkout, I looked and sure enough I think this has happened with my account too which is terrible! Some customers have been with me for years and then all of the sudden they're off my mailing list because they didn't check a box? I'm uninstalling this app today.