I like the approach, but think both "fediverse" and "link-aggregator" are just not good terms from any sort of branding/messaging/marketing perspective. They're both relatively technical or confusing and inaccurate. The fediverse isn't really a federation, which you forget once you understand what federation is in a computing sense or in the case of the fediverse, and lemmy and reddit aren't really link-aggregators, they're more like forums.