When reading this article, I got an impression that US government banned Telegram from issuing certain securities, but after reading comments and links I come to the conclusion it's not the case and actually US government just said "it's a security, so you have to follow our securities procedures". Granted, those are not very fun, but that's not what Telegram complaint is - it looks like they tried to sneak a fast one and it didn't work. Well done Telegram marketing for temporarily misleading me, I guess.