I cannot for the life of me remember how I created the newsletter sign-up pop-up on my website. It's pink-shell.com. I want to get rid of the pop-up for now because it does not appear correclty most of the time. Here are the apps I currently have installed: Mailchimp, Oberlo, Free Shipping Bar by Hexton, Incart Upsell by Awesome Software, Yotpo Reviews and Tracking & Delivery by Aftership. I've ruled out all of these. I still think it has to have been created in Mailchimp, but I cannot find it listed in any of my ongoing campaigns.
Seriously pulling my hair out...
I confirm it was created with MailChimp.
You should check your theme files (reference: https://ecommerce.shopify.com/c/ecommerce-design/t/embedding-mailchimp-popup-into-shopify-theme-3288...).
I hope it helps :)