I think e621 was taken because it is more neutral than any of the other sites. Inkbunny is obviously biased because a large number of the initial users came there because it allowed cub porn and FA had just banned it. Similarly FA is then out because they don't allow the content so it's a pointless place to measure. SoFurry might have been a good site to use as a test (14223/303637 = 4,68%) but it's also biased according to what people create. Not all furs actually produce content so what you will actually be measuring is how productive cub artists/writers are. If you use a site like e621, which pulls content created by other users, you will probably get a better impression of what the fandom as a whole consumes.
"If all mankind minus one, were of one opinion, and only one person were of the contrary opinion, mankind would be no more justified in silencing that one person, than he, if he had the power, would be justified in silencing mankind."
~John Stuart Mill~
I think e621 was taken because it is more neutral than any of the other sites. Inkbunny is obviously biased because a large number of the initial users came there because it allowed cub porn and FA had just banned it. Similarly FA is then out because they don't allow the content so it's a pointless place to measure. SoFurry might have been a good site to use as a test (14223/303637 = 4,68%) but it's also biased according to what people create. Not all furs actually produce content so what you will actually be measuring is how productive cub artists/writers are. If you use a site like e621, which pulls content created by other users, you will probably get a better impression of what the fandom as a whole consumes.
"If all mankind minus one, were of one opinion, and only one person were of the contrary opinion, mankind would be no more justified in silencing that one person, than he, if he had the power, would be justified in silencing mankind."
~John Stuart Mill~