Possibly the last time I post this set of another way of looking at the numbers, here...As Maria points out each time they only have some probative value. [as do all numbers, actually..lol]
I will continue to throw them up over my my g+ community mentioned below for anyone who wishes to jump over there and look-))
% of activity to total users:
3rd Rock = 4.7
avatar sex grid = 6
Avination = 3.1
Craft World = 1.4
Fleepgrid = 7.6
inworldz = 8.5
island oasis = 20.7
kitely = 3.5
lost paradise = 11.4
Metropolis = 25
osgrid = 3.8
virtual highway = 12.2