my proposition wasn't so much considering the success of a group based on the number of members (that might be a topic for a different day) but the per member profit which is better for groups with less members
lets take izone for example as they are GG with the most members they would need to sell triple that of BP for each member to receive the same $$$ (again ceteris paribus)
i might actually breakdown the per member album sales for 2020 later for the top groups to do comparison