Its not surprising that a lot of the cheat/hacks out there come from Russia. The exchange rate between USD and Rus R is big enough to make it worth Russian cheaters' time to hack paysite programs either through scummy promo tactics or maybe outright reassigning aff ref codes at the processor level. In addition to the exchange rate, Russians have a high level of technical training. Unlike "script kiddies" a higher proportion of Russian hackers actually write and research their own code.
Frankly, I'm surprised that we haven't heard more stories of card processors being duped into paying cheaters instead of the webmasters that legitimately sent the conversion.