“They practically detained the head of communication of the Russian army,”
As hilarious as it sounds, it's at least partly true.
I heard whatsapp is better in low signal conditions, so they use both
I've also seen Discord being used on video footage from the war so I'm not surprised they'd use Whatsapp as well.
We had a client who wanted us to do a security audit and communicate the results—unpatched vulnerabilities mind you—via Discord. They could not be dissuaded.
Please could whoever downvoted this explain why? There's plenty of evidence of this. Access to Telegram would be like cracking Enigma