I asked Fable and GPT 5.6 to estimate the market share of email and newsletter companies in the Creator Economy. A few observations: 1. This generally follows the trend that I expected, with Substack as the largest and Kit as a close second. 2. The numbers are all low compared to what I know (e.g. Kit and Beehiiv's revenue). So it's safe to assume everyone is earning proportionally more than reported here. 3. I still think MailChimp, ActiveCampaign, and Campaign Monitor have huge numbers…