Telegram has hundreds of millions of users. Unless you heard from a few million, at least, you can't say that a lot of people got their accounts banned. It's true that changes were made to Telegram's TOS and Privacy Policy and each person should check for themselves if they agree to those changes and act accordingly. Telegram will cooperate with law enforcement if presented with a court order and/or valid reason for requesting user information. World governments have bigger problems than checking who uses Telegram to play slots and table games. 

If you don't take proper precautions with websites and services where you keep your money, don't blame the service if something out of their control goes wrong. Don't use virtual phone numbers unless you are ok with their cons.