Change.org's nearest audiences span magazines, news publishers, fashion brands, comedians, and non-profits — a wide categorical mix compressed into a narrow similarity band running from 0.90 down to 0.87.

The shape is flat: Noah Everett (0.90, Tech Personalities) leads by a slim margin over ELLE Magazine (0.89, Magazines), ABC News (0.89, TV Channels), Yahoo News (0.89, News Publishers), and HBO (0.88, TV Channels). No single neighbor pulls away from the pack. Tallying the top 10 by subcategory: Magazines account for two entries — ELLE Magazine and Vogue Magazine (0.87) — alongside two TV Channels (ABC News and HBO), one News Publisher (Yahoo News), one Tech Personality (Noah Everett), one Department Store (Bloomingdale's, 0.88), one Website (Tumblr, 0.88), one Department Store (Saks Fifth Avenue, 0.87), and one Non-Profit (Amnesty International USA, 0.87). Change.org's own subcategory — Activism — appears once in the top 10, in Amnesty International USA.

The cross-kind character of this cluster is the defining feature: the audience that follows an activism platform looks compositionally similar to audiences for fashion magazines, premium retailers, and mainstream broadcast news, with only one fellow activist organization in the nearest ten.