Why Nintendo? Far as I know, they've never released anything on an xbox console.

The PS3 was incredible value dollar-to-flop, given that it was sold at a loss. This resulted in universities and other research institutes buying them en masse to create supercomputer clusters. Naturally buying thousands of consoles but not a single game puts sony in a difficult position. Although I think it's sad the hardware got locked down in later revisions, I fully understand why they did it.

Linux on playstation was a play by Sony not to have customs like on a toy but as a more favorable computer merchandise. They didn't care.