"Oh wait, they don't make any money from it. At all."
Eh, so what? It's not like the devs make money, say, if you an used copy from a store, either, but I don't see people excusing piracy because they "could've bought it used and the devs hadn't seen the money then, either".
"In fact depending on the EULA resales are borderline legal in the first place."
Borderline legal is better than illegal.
"EDIT: Also Googling SNES9x would probably get Craigboy more pertinent/concise results."
ZSNES is better.