I haven't seen any Gamblig Platform who used Telegram for Promotions, most I know is that they use Discord.
Do you have any Idea why they don't have any Telegram Communities? and why does it seem they don't use this platform for their promotions?
Telegram is widely distributed among the crypto community due to the large number of advertising campaigns for new projects. In fact, this program is good for one-time promotions, Telegram is not very good for long-term use, because it is difficult to search for previously published information. For this purpose, Discord is much better suited.