customer.glencoco.com/campaign/{campaign_id}/supplementary-text

Describes a key location for Customers: customer.glencoco.com/campaign/{campaign_id}/supplementary-text, which we're not sure whether is being actively used or not.

Prerequisite: Customers must create a business workspace at https://customer.glencoco.com or be invited into their company's existing workspace using a non-personal email domain.