I have about 2,500 subscribers on MailChimp I've never written to. I tried to send out a free email and MailChimp said I need to pay since my subscribers are over 2,000. Then when I paid the monthly fee it still wouldn't let me send the email. It said now I need to have the whole 2,500 people on the list to reconfirm their subscription. I heard I can avoid this process by converting the ConvertKit.