Before revision:  In particular, we find that the news comment count follows a universal exponential distributionwhich is explained by the lack  of the otherwise omnipresent rich-get-richer mechanism . Exponential aging induces a universal dynamics of article impact.
After revision:  In particular, we find that the news comment count follows a universal exponential distributionwhich is explained by the lack or limited influence of the otherwise omnipresent rich-get-richer mechanism . Exponential aging induces a universal dynamics of article impact.