VK is the Russian Social Network like FaceBook. I decided to give it a try. So far the interaction has been amazing. Not a lot of hits yet but great interaction. I attached a screen shot of the site i posted links to on VK. Not a lot of data yet but what I see so far is exciting. The pageviews per user is the key metric here. I'm going to focus more on VK and see how it goes but I'd love to hear feedback from anyone else that is using or has used VK for social traffic.
Its sends purely russian traffic, i haven't seen too many visits from it thou, Maximum i remember was 8, but somewhere it shows in rankings for my domain name keyword. I think it helps in boasting Domains value in google + may be keyword pushing as well
There is one problem with vk when you second time login to that site, they always give you error message that your username or password was incorrect.
VK is definitely excellent if you are targeting a Russian niche market. I used it in one of my niche sites and the results were impressive.