Never heard of this guy. So I also can't comment. Anyways, I'm trying to find out more about the the owner of the said website and I get this news:

(https://forexclub.pl/en/crypto-academy-kryptowaluty-oszustwo/). I'm not saying that they are going to steal someone's money, but the news was enough for me to stay away with paid trying courses. Besides there are thousands of free courses and Youtube is also a good source of knowledge.

joniboini - probably a good marketing ploy for the owner. Telegram is run by bots so its going to be hard for the owner to market it there.