He is saying that replying to Facebook comments takes up too much of his time, which he could better spend publishing more of his humorous pieces in his Telegram channel (if I understand correctly, Telegram channels do not support readers' feedback).
To lure his Facebook readers into Telegram, he is posting links to his Telegram-only texts that are closed for the rest of the web.
What puzzles me in this scenario is why not just have your own website then, without comments, or publish in a special custom-tailored medium such as Leo Kaganov's hultura.ru. If his goal, as he says, is to make his writing more widely available, then how does closing them off from the rest of the internet help?