There might come a time where we asians can get more surveys to complete. Let's just wait and see. I bet the moderators or the owner of this site would want all of the members to earn more as well. Patience :)
How about a monthly contest for each country and one international, so the prize for each country is like 1 place wins like 40 coins 2 place 30 coins 3 place 20 coins and 4-10 places wins 10 coins