Prime-Ex's system is based on the Russian waves blockchain operating system and not Ethereum. This will be something of a test for waves because as far as I know, this is the first time that a waves based application has been made available outside of Russia.
Actually, there are several non-Russian companies in the west that are making use of the Waves platform. We use vendors from all over the world regarding construction materials in our houses, and consider it no different on the technology side. Where Waves happened to be created never entered into our equation.
We made use of the Waves platform because we felt it best met our needs and not because of anything else. We will strive to be a company you can be proud of, and we hope to one day be among the very best Waves-based performing tokens, irregardless of where we, or Waves, happens to be domiciled.
Such a great value! especially while volatility of bitcoin was so high. 
