ICQ was bought by... uhh Russians? Israelis? Something like that... and was changed several times what it actually is; when I tried it recently, it was just a WhatsApp clone; they even removed all the old ICQ number accounts.
I'm actually kinda bummed to hear that. I logged in sometime in the past few years and was pleasantly surprised to see my number from the 90s still worked. Moot point now if the whole thing is being shut down anyways, I guess.
Russians, given the VK app plug in the announcement.
Yes, ICQ was bought by Russians in 2010, and it was already dying at that time.