NimeshP is absolutely correct. We recently upgraded to Magento 2 and the code no longer works for email sign-ups. I called Constant Contract twice and each representative of course gave me different answers that basically boiled down to its time to switch to another service like MailChimp What a shame since i believe we were one of the original CC users. Shame on you CC. Millions of Magento users are just going to have to bail on you.  ... View more