The “passion economy” thesis assumes that an audience will want everything a creator brings to market, the way viewers of the “Rachael Ray” show will often buy Rachael Ray cookbooks and cookware. But starting a newsletter does not immediately lead to speaking engagements, and not all writers can generate multiple distinct products. Yglesias told me... See more

Both Substack and The Athletic do what the Internet does best—carve out deep, lucrative niches—and both rely on Twitter for discovery.

In its early days, Substack primarily catered to a certain set of internet-savvy writers and journalists, lured by the promise of monetizing a direct relationship with their readers. But as it morphs from a niche publishing concern into a heavyweight start-up mentioned in the same breath as Twitter and Facebook, its user base is proliferating accor... See more