What function does Instagram provide with this WebRTC listener besides tracking? People install Instagram to look at photos and reels, not to help facebook tra

What function does Instagram provide with this WebRTC listener besides tracking? People install Instagram to look at photos and reels, not to help facebook track them better. If I put a crypto-mining script in a game I don't get to claim "well they installed the app" when people complain. The victims thought they were installing a game, not a crypto-miner. Here, the victims thought they were installing a photo sharing application, not a tracking relay.