"MIT doesn't bar additional restrictions" is a bit weird of a statement when the MIT license itself already gave permission to do almost anything with the code.

"MIT doesn't bar additional restrictions" is a bit weird of a statement when the MIT license itself already gave permission to do almost anything with the code. My emphasis. > Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software *without restriction*, [...]