I hate to single out any area of the world but whenever I suspect something and do a whois it is more than 75% of the time it's a russian webmaster. Many times they are not even cheating (meaning redirecting) but submitting under 6 different names using 6 different emails and domains.
As the internet reaches more areas of the world where $1000 US will provide a good living to people not paying taxes on that money it will only get worse.
Getting to the question of abuse overall? It's submitting under different names and emails constantly for link lists. For TGPs I bet it is redirecting for sure.