I’m disputing that they already have money to cover the costs
Federal subsidies to telcos were not intended to provide Internet service for free, but to reduce costs.
You could argue that a subsidy should reduce prices relative to what they should have been, had no subsidy existed.
But you cannot argue that pricing should be decoupled from consumption as a result of that.
One imagines that it might have some negative effects on people in Russia, not all of whom are trolls.
It may also have secondary effects on people outside Russia if the leadership wants to do something that people outside Russia don’t much like, but where public opinion in Russia is a constraint on them. If Russia builds a system that is aimed at constraining the public’s view of the world, then presumably the views of the public will shift towards whatever the people who are presently running the government in Russia prefer.