The sentence probably isn't political. Seleznev really was working at a scale that surpasses that of pretty much anyone else the FBI was tracking for similar crimes. It was a monumentally brazen and damaging operation.
There are in this particular case no mitigating factors we can see, and several aggravating ones.
Has the average time served at 48% of the sentence at 71 months.
140 months is a shade under 12 years.