Many here want the "let best compete" in the GP series(some insist Worlds/Olympics as well), and thoughtful views offered are well taken; however, I see little difference in having best 3 or best 6 from a single country at GPF. The most capable skaters will rightfully claim his/her glory on the medal podium regardless. The issue here is the equitable inclusionary participation of as many international skaters as possible. My favorite sports quote goes:
"We didn't lose the game; we just ran out of time. "
-Vince Lombardi
The fact of the matter is that the current GP system already does not stick to the Darwinian best skater policy as one would like to believe otherwise. Aside from the hosting of the events in only six preselected countries:
"Skaters who are not seeded can be invited by the hosting country and each country can invite up to three of their own skaters for each discipline. This is to give a balanced field throughout the series, as well as allowing the hosting country a chance to showcase their top competitors."
http://en.wikipedia.org/wiki/ISU_Grand_Prix_of_Figure_Skating
Who would blame them given those depressingly empty seats we often see in these events.

hwell:
Figure skating needs to grow, and grow internationally. In this regard, consider the case of the most popular professional sports competition in the world, the European Champions League Football(with a king's ransom as prize money). There is a restriction as to how many teams per country(per domestic league) can enter the competition, not to mention the presence of sizable foreign players(Europe, America, Africa, Asia..) in each of the competing clubs. One does not need to second guess the effectiveness of such international diversity contributing towards the sport's enormous global popularity.
In the issue of diversity and success, Russia and US have historically dominated the sport of figure skating and accounted for almost 200(out of 492) medals in the GP series.
http://ww2.isu.org/historical/fsgpmedals.html
Fair-minded skating fans should be wary of the attendent corruptive influence of such dominance(e.g., Salt Lake City scandal).
Competetive landscape of figure skating is a work in progress, not unlike any other international sports and their "rules of engagement". CoP is a recent welcome change over the 6.0 towards a more objective judging, but then again this particular controversial CoP topic may have been over-threaded, or maybe not..