Not sure... some peoples with more FP and better caches does not win a reward.
And, hopefully, incredibles geocachers wins too (like Kirdec in France).
Hard to understand indeed... It seems so easy to make a better algorithm based on few parameters (karma, FP ratio, age of owned caches...) but GC failed to make something nice.
Anyway, it's a good idea to place new virtuals... now, i'm waiting for web-cam caches :)