There’s an updated (February 2021) Microsoft Open programs overview document.
Just four pages long, it’s a summary of all of the key points of the Open License, Open Value and Open Value Subscription programs, and is updated for the discontinuation of the Open License program in December 2021, and the availability of Open Value offers for education and nonprofit customers in July 2021.
Find this document here: https://bit.ly/3kWBheV