This is very clever - and potentially a resource for attackers. You probably should be blocking this on corporate networks. Another example of tools which lower the technical bar, giving less sophisticated attackers access to easy to deploy and use tooling. https://www.gsocket.io/deploy/?utm_source=pocket_saves
Global Socket

Connect like there is no firewall. Securely.

Global Socket
@alberg looks tricky to selectively block, as the relay service it uses goes over tcp/443.