Free Microsoft 365 E5 subscription for developers

Our company purchased two Microsoft Office 365 subscriptions, which are mainly used for the development and testing of our enterprise product. Until today I found that Microsoft provides free E5 subscriptions(25 accounts) for developer accounts… anyone can setup the subscription at https://developer.microsoft.com/en-us/microsoft-365/dev-program

Two points about the developer subscription:

1. If we’re using the subscription for development, it will be renewed every 3 months and will last indefinitely.
2. Windows and Audio Conferencing are not included in developer E5 subscription.