If you contribute to RT's viewing figures you are boosting their advertising revenue.
They're not like Al Jazeera, for example, that is monumentally biased with it's anti-semitic documentaries, and never breathes a word of criticism of Qatar and all the dead bodies that fell in the cement to build the World Cup stadiums. They are selective. But they don't actually lie.
RT on the other hand has promoted all sorts of crazy conspiracy theories about the Litvinenko and Sturgess murders, and Ukraine, where they excelled themselves with a mock-up collage that could have been made by Year 5 showing Ukrainian jets attacking MH17, allegedly a screenshot from Google Earth.
Block them.