Who install backdoors? - VK or mail.ru?
Are You thinking, that people have no way to connect with this services?
VPN is still there and some are for free.
Latter.
I see no reason to use such "services" though. Refer to the website in my previous post. You should have no struggle reading it, but maybe it won't be comprehensible to you.
You should really only speak or actually write in russian with 247crypto , he is using a very bad translator (worse than google) for his posts.