Do not be so fast with 'not true' claims. Russia has at least three social networks, each with audience bigger than russian audience of Facebook and Twitter combined. All three remove anti-putin groups, etc.
the third one is Moi Mir (https://my.mail.ru), an extension of by far the most popular email service in Russia. Mail.ru corporation actually owns all three of them.
VK absolutely does remove anti-putin groups and events. [1]
