There's actually more than that if you look at all of the variants that MIT
has used over the years, in the Old Style area:
https://fedoraproject.org/wiki/Licensing:MIT
So there really isn't one "MIT" license and the very name "the MIT license"
is ambiguous.
Ionic and React Native are famous hybrid app frameworks. They are qualified
as "open source" as their license is MIT but I'm not sure if they are fully
free. They are not listed on the Free Software Directory. I hardly find any
discussion about them within the free software community.
