RDR was never release for PC and so far, they don't have plans for that. Also, cartridges were very much pirated...everything was pirated at it's time, no way around it.
first i wanted to contribute to the topic of the tread and tell you something about the CLR but since its morphing into DRM VS PIRATE talk again, i say nothing about CLR
If the cartridge is in a format/size that cannot be read my pcs or macs it would be alot more frustrating, and to burn them. Its one of those things where if you pirate you risk messing up your console.