In mid-2021, Gabor Cselle bought a $15 Moleskine notebook to sketch out ideas for new startups. On the first page, he wrote “T2” and began taking notes for a better version of Twitter. Cselle had sold startups to Google and Twitter and worked at both companies. (He was at the time at Google for a second stint, as a director at Area 120, its startup incubator.) But he couldn’t figure out how to draw people away from “T1”—the original Twitter—and set the idea aside.
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