Mandrill (Mailchimp) changed their terms of use which resulted in an exodus of high-volume customers who refused to pay Mailchimp's exorbitant bulk email rates.

Mandrill (Mailchimp) changed their terms of use which resulted in an exodus of high-volume customers who refused to pay Mailchimp's exorbitant bulk email rates. Sendgrid was johnny-on-the-spot helping people migrate.