Comment by handoflixue

I'd imagine most English-speaking internet users have gotten used to doing local-to-USD conversions. As someone in the US, I usually know about where CAD, AUD, and GBP are relative to me.

Even if you don't know the conversion, something in the range of 50-200% is a lot easier to adjust to, whereas Rubles are on a very different scale (1 GBP = 108 Rubles)

Obviously the ideal would be local listings, but USD is probably the most-familiar reference point if you have to choose exactly one