Max messenger, this is piece of shit, but it based on TamTam messenger codebase and this not a fork of Telegram.
Please don't copy-paste this crap posts.
https://chat2desk.com/blog/stati/tochno-ne-zablokiruyut-obzor-rossijskix-messendzherov-v-chat2desk

Π ΠΎΡΡΠΈΠΉΡΠΊΠΈΠ΅ ΠΌΠ΅ΡΡΠ΅Π½Π΄ΠΆΠ΅ΡΡ MAX, Π’Π°ΠΌΠ’Π°ΠΌ ΠΈ ΠΠ: ΠΎΠ±Π·ΠΎΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΠ΅ΠΉ ΠΈ ΠΈΠ½ΡΠ΅Π³ΡΠ°ΡΠΈΠΈ Ρ Chat2Desk β₯ ΠΠ»ΠΎΠ³ Chat2Desk.com - ΡΠ·Π½Π°ΠΉΡΠ΅, ΠΊΠ°ΠΊ ΡΠ°Π±ΠΎΡΠ°ΡΡ Ρ ΡΠ°ΡΠ°ΠΌΠΈ β ΠΠΈΠ΄ΠΆΠ΅ΡΡ WhatsAppβ’, MAXβ’, Telegramβ’ Π½Π° ΡΠ°ΠΉΡΠ΅ ΠΈ Π² CRM β ΠΠΌΠ½ΠΈΠΊΠ°Π½Π°Π»ΡΠ½ΡΠ΅ ΡΠ΅ΡΠ΅Π½ΠΈΡ Π΄Π»Ρ ΠΏΡΠΎΠ΄Π°ΠΆ ΠΈ ΡΠ΅Ρ . ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠΊΠΈ
@ashed I will do more research on this and look for authoritative, independently-researched analysis, but the site you are citing here appears to be pro-MAX propaganda, quite possibly backed by VKontakte, basically encouraging people to install a trojan on to their phone.
If VKontakte decided to rip off Telegram's tech with the FSB's blessing, they wouldn't admit to it regardless, and might integrate elements of their own code and UI to do it.
Try to research from this atticle.
Habr.ru in Russia seems like Slashdot in USA.
https://habr.com/ru/articles/938518/
And here is detailed deep analysis of Max messenger.
https://github.com/Illirgway/MAX-deep-analysis-of-the-messenger

Π‘Π΅ΠΉΡΠ°Ρ ΠΌΠ΅ΡΡΠ΅Π½Π΄ΠΆΠ΅Ρ Max Β«ΠΎΡΠ΅Π½Ρ ΠΊΠ»Π°ΡΡΠ½ΠΎ Π»ΠΎΠ²ΠΈΡ Π΄Π°ΠΆΠ΅ Π½Π° ΠΏΠ°ΡΠΊΠΎΠ²ΠΊΠ΅Β» π Π‘ΡΠ°Π»ΠΎ ΠΈΠ½ΡΠ΅ΡΠ΅ΡΠ½ΠΎ: Π° ΡΡΠΎ ΠΆΠ΅ Π·Π° ΡΠ΅Ρ Π½ΠΎΠ»ΠΎΠ³ΠΈΠΈ ΡΡΠΎΡΡ Π·Π° ΡΡΠΈΠΌ ΡΡΠ΄ΠΎΠΌ? Π‘ΠΊΠ°ΡΠ°Π» APK (Π²Π΅ΡΠΈΡ ~114 MB) ΠΈ ΠΏΠΎΠ»Π΅Π· Π²Π½ΡΡΡΡ. ΠΠ°ΠΊ ΠΊΠΎΠ²ΡΡΡΠ» ΠΠΈΡΠ΅Π³ΠΎ...