I created a paid subscription on Boosty and it has Telegram chat. On Boosty you can find a monthly personal sketch packs (some of sketches have never been published anywhere before), high-resolution artwork and sometimes .psd files of my work. In Telegram chat, in addition to everything available on Boosty, I will publish 18+ content (unique and public), as well as rare discounted commission slots and unique and/or experimental types of orders (e.g., stickers, sketches, etc.). BUT I should warn that chat mostly on Russian language and mostly with Russian speakers at the moment. Still, me and some of other subscribers can speak English so you'll not leave without translation if you'll be interested in something.
If you're interested, I'd be happy to see you among my subscribers! The cost of subscribe is 69 rubles/month, it's less than $1.

✨ https://boosty.to/murkitsu ✨