Discord is a security nightmare, it doesn't like firewalls, in fact to use it you to have to unblock ports 433 and 50000-65535 to all destinations. I wouldn't be surprised if other services not limited to voice and video streaming are in that tool using many of these other ports, say cryptomining, that takes a small percentage of your video cards processing to run that task while you run the free software, You shouldn't notice a slight drop in frame rate, right?. Then multiply that by the few million users they have.....
Me cynical?