could there be some correlation between myspace fading into obscurity by late 2010, and last.fm following its steps, with tumlr not really being focused on music/media sharing, but rather being granulated into small fandoms and meme reblogging? the myspace/last.fm tandem were relatively efficient for sharing media and luring heterosexual men into mana sama's fandom dungeons.
nowadays tho there's barely any way for unsuspecting normies to get acquainted with this genre (visual kei in russia was covered by both animoo/gaming magazines and the local teen vogues of the time around '03-'05) - and I'm not even aware of those existing these days, press took a huge nosedive as well somewhere past 2012;
everything that was spoon-fed in bi-weekly issues is now spread over a dozen blogs/twitters that I have zero interest of following tbh.
I think there's an overall trend of Japanese media losing its presence in general (like the only semi-recent development I'm aware of is anime alt-right nazis, aside from regular pokemon iterations); lack of new bands of the same caliber as what used to define VK even in early 2000s is also showing - another Rentrer en soi or kagerou caliber band would be both welcome and will definitely revive interest in the scene. there's not much stuff comparable to those. even a good nightmare or SID copycat without the excess of ayabie's poor choices would probably do something in a scene this dire.
It's a combination of higher population density (Tbilisi that you've linked has over a million residents), not much other stuff going on coupled with the novelty factor of a real japanese celeb descending over there, and likely close-knit local vk.com animoo community sharing news in advance.
iirc, the recent gazette moscow gig was sold out in 30 minutes (I can't find a source for this though, was on someone's instagram that I don't follow on the reg.)