- allowed the code to be visible and available as a general rule
- allowed an individual user to use it and modify it for non-commercial use
- disallowed redistributing modified versions (distributing patches would be fine)
- disallowed commercial use
Basically, a license that would allow free experimentation and grassroots adoption and all kinds of open-source goodness for individuals, while not giving FAANG profiteers a handout for RMS' ideological reasons.