time to reread The Space Merchants?

The industry provides corporate and government clients with insight into conversations on private, invite-only Discord chats, WhatsApp groups, Reddit forums, and dark web message boards to help those powerful customers keep tabs on a variety of potential threats, from political hacktivists to the illegal markets that traffic in stolen passwords and intellectual property.

From Private Spies Hired by the FBI and Corporate Firms Infiltrate Discord, Reddit, WhatsApp