Suppose I wish to propose a challenge to quantify the "degree of concentration of wealth" as it pertains to "rep" on various Stack Exchange boards. The measure being used, the Gini index, is formally called a generalized inequality index, which is unfortunately too formal and too general.
Specifically, I'm looking at "rep" concentration as a measure of how acutely a large community is represented by a small number of individuals.
Is there a single word or expression that describes this quality? Something along the lines of "cabalistic-ness", or "activity concentrated-ness", if these were actual words?
One might invoke the same quality in other situations as well. For example, if a particular gaming website claims to have ten million users, but 10,000 particular users account for 98% of all gaming hours logged, one would say this is a _____ gaming site, or a gaming site with acute _______.
In casual conversation, the only adjective I've heard that alludes to this meaning is inbred, but I'd like to avoid the negative connotations associated with that word if possible.