Because Russia companies can’t make Pepsi products, they just don’t have the supply chain to get the flavor right. They can, and do make similar products already, it’s just Mountain Dew is way better than off brand Mountain Dew. If the Russian consumers wanted that, they would have been buying it already.

I for one would never drink a cola that is not coca cola. Soda is a luxury, and in my opinion no other cola has the flavor profile to be worth the calories. Some people feel the same way about Pepsi, and a massive amount of people feel that way about Mountain Dew and other Pepsi products.