I don’t what the situation will be for existing users, but it looks like this is a change for future users, perhaps this may affect you on renewal? see https://www.microsoft.com/en-us/nonprofits/faq?SilentAuth=1
Q. How has the Azure donated credits offer changed?
The Azure donation offer has been modified in response to feedback from our nonprofit customers. The total donation value of Azure services available with this offer is still valued at $5,000 (USD), but will now include an Azure Active Directory Premium donation via a donated Enterprise Mobility + Security E3 subscription valued at $1,500 (USD). Thus, our Azure credit offer will include $3,500 (USD) for any Azure services in your Azure Admin Portal, and 50 licenses of donated Enterprise Mobility + Security E3 available through your O365 Admin Portal.