For companies that are still in business that have a lot of nostalgic fans like Nintendo or Rare wouldn't it make sense to sell their own ROMs? I know they do some things like Nintendo online with the SNES and NES ports and other ports to newer consoles. But for companies who made games for the older consoles but have nothing to profit from console sales why don't they sell their ROMs online? Is it some sort of licensing/copyright issue? I feel like it wouldn't be much work as emulators already exist and ripping ROMs would be a lot easier since they own the games.