It was apparently $100k spent by RT to promote news stories. Why is it so unusual for a news company to spend money promoting news stories on social media sites? This is nothing out of the ordinary (including if a government did try small actions to impact an election), and yet it has become such an intense witch hunt during the 2016 election.
Because its not a "news company", it is a known propaganda arm of the Russian Govt. masquerading as a news company. If it was an independent news agency, it would be OK.