I have tried following steps to setup Abandoned cart using Mailchimp module.

Setup

• Magento 2.1.9
• Default abandoned cart automation (series of 3 emails) in MailChimp
• Sync with MailChimp listed as complete - I can see recent customers listed on MailChimp and ecommerce data for recent orders, Total Products, Total Carts.
• Checked the table cron_schedule for the job_code ebizmarts_ecommerce and not found any error message
• Checked the table quote and confirmed that the quote was not converted.
• Checked the tablemailchimp_sync_ecommerce with type = QUO and related_id, and not found anything on mailchimp_sync_error table for this quote

Steps

• As a logged in user or guest, add items to cart and get to payment step of checkout so that email address is captured in quote.
• Ensure that eCommerce CRON job is running
• Wait for whole day and maybe longer

Expected Result

• An abandoned cart email and listing at least 1 email sent in MailChimp

Actual Result

• No email sent MailChimp lists
• 0 emails sent out