This seems like a common knee-jerk reaction lately - if something comes out of Russia, it must be the government doing its authoritarian stuff. But you are reading it backwards. Russian government doesn't need any "excuse" to block something - if they want to, they just go ahead and do it. Instead, it is rambler that is using its connections to government as a credible threat to extort bigger settlement.

> Sberbank, the parent company of Rambler

Sberbank is not the parent company of rambler, they have recently bought 46.5%.