I just went to send an advanced email and had this message pop up:

"You've exceeded your Advanced Mass Email subscription limit.

Your organization's subscription lets you send ___ advanced mass emails but has already sent ____. To purchase additional emails, contact your Blackbaud Account Executive."

It would have been helpful to get this message before attempting to send, or for Blackbaud to not outright block their nonprofit clients.

Thank you for your assistance and time.