Telegram, the globally popular messaging app with 900 million active users (since 2025), has long stood out because of its privacy-first approach and ad-free user experience — at the very least in private chats and groups. But as the platform is maintaining growth, Telegram has introduced a form of advertising https://hedgedoc.k8s.eonerc.rwth-aachen.de/flqkL9hfSYm8eZkR4aa-BQ/