Did you read the linked article through the second paragraph, where they start talking about the evidence? What do you think about FireEye's statement? What do you think about their behavior - also discussed in the article - about posting on Reddit? It seems like you can safely ignore that they are Russian and characterize USAReally's behavior in the same way. When you add in their location and funding background, that just adds to the case.
I'm not stating anything about the overall merit of these suspicions. Just that some units of evidence that boil down to "because they're Russian" really ought to hold no weight.
Well, it's the "because they're Russian" observation that drew attention to USAReally. I mean, at first glance USAReally just looks like trashy clickbait fodder posing as a 3rd rate Fox News wannabee.
It didn't take much (or any) sleuthing to discover that they're Russian government funded. At that point one has to start asking WTF questions.
edit: I added to my comment before you replied in https://news.ycombinator.com/item?id=18355858, I think it addresses your point.