if the dependencies that CorridorKey used weren't actual open source than they would not be able to release it under your concept of "fair use"...

we're talking like pytorch, numpy, and other large foundational libraries released not as shareware, but for free.

so either the foundational libraries are true oss, or the consuming libraries cannot be shareware. you cannot have it both ways.

everyone loves restrictive licences when it's their project of course