I've had numerous spam signups from Chinese-based email addresses. Please add CAPTCHA to ALL email sign-up forms (even if confirmed opt-in is enabled). As a smaller organization, we don't hit the 50/day minimum and having to clean up these erroneous sign-ups takes half-a-day to do. It's a waste of time for the customer to have to constantly export and re-import as unsubscribed the spam email addresses. I don't understand why this is not currently a main email list feature. It's sad to see this question was raised over a year ago: https://community.constantcontact.com/t5/Need-help-with-something-else/Need-a-captcha-on-signup-form/td-p/295758
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