The scary part is how much real interpersonal communication data they have on users and what could be done with it in the wrong hands. What is their real business model? It can't just be selling Nitro.
Discord watches what apps you launch, primarily games, and sells this data to others to determine what games to make, or what games people are playing. It’s the same purpose of all the game launchers out there that run even when you’re not playing a game from that company.