Read the replies from all the serious crypto security people on twitter and you will see the overwhelming consensus is that the FSB/Spetssviaz and FBI/NSA probably love Telegram for its roll-your-own-crypto and server mediated group chats.
One also has to wonder if the FBI consider the Telegram team to be essentially undeclared Russian agents, and hence fair game.
One also has to wonder if the FBI consider the Telegram team to be essentially undeclared Russian agents, and hence fair game.