[Krosan]

He joined other groups too.

From the linked investigation (google translated)

Among the groups Gloss joined at that time were "Romantika russkikh vil'deniy", "We are from the USSR", "USSR Lenin Stalin Marxism Communism Communists", "Islam", "KPRF".

[Fedora]

Thanks, very detailed article. It looks like those are Russian social media groups he joined on the VK (ВКонтакте) network.