aint sure if stratified random sampling was a better way do to do it. stratification at best could be at the continent level. more specifically region wise. APIMEA and so on.......
if members are in agreement to the same and if the statification process is not very tedious the same could be applied to the monthly prize draw as well.
imho this would have equal representation from all the continents. needless to mention the probability of selection would be dictated by the number of members (N) in the stratified unit.
Sorry but I disagree 100.0%. Why should anybody have more (or less) chance of winning just because he happens to live in a certain place? Totally unfair to everybody.
Indeed...
What if I was the only one registered on, say Antartica?
Would I win every time?
No, not Antartica! May I suggest a move to the tiny town of Kifuka in Congo? π