This isn't a remotely new or unique precedent. Mailchimp and every other email marketing company have always had lists of prohibited content categories. https:

This isn't a remotely new or unique precedent. Mailchimp and every other email marketing company have always had lists of prohibited content categories. https://mailchimp.com/legal/acceptable_use/ https://mailchimp.com/legal/acceptable_use/ https://ui.constantcontact.com/CCProhibitedContent.jsp https://ui.constantcontact.com/CCProhibitedContent.jsp https://help.convertkit.com/article/76-terms https://help.convertkit.com/article/76-terms