It's not like you need Telegram to buy Drugs in Hamburg. There are places like the U-Bahn Sternschanze or the Hafentreppe where Dealers have been continuously offering light and hard drugs for over a decade with an uptime that puts FAANG SLAs to shame. They occasionally get raided whenever the police wants to have their pictures in the local papers but it's not like there is anything you could get via Telegram that you couldn't get through a five minute walk. The only difference is that the Dealers protect their turf, so Telegram opens new avenues for competing dealers to enter the market.