Dude, feels like you have no clue how big stake actually is. Just so you get an idea. I just wagered 1$ for the daily 100k race and I am in around 108000th position, with still 19 hours to go. So over 108000 players wagered more than 1$ in the last 5 hours, most of them wagering hundreds, thousands and millions obviously. Stake is HUGE in player base and so on. Having 63k people subscribing the telegram channel is absolutely nothing.
Also Stake owns Kick which is Twitch rival where even Mr Beast streamed. They sponsor F1 Sauber Motorsport, have ads everywhere, etc. They are one of the biggests in the world, so many people play there I'm not a bit surprised with 108,000 players in 5 hours. They probably have more than 7 digits players every month.