"On Wednesday, Substack announced the new features that allow writers to embed prediction markets data directly into their newsletters and in Notes. (Instead of pasting in a link from Polymarket, writers can now search for and add data through the Substack Editor.) The features build on the partnership first announced in 2024 and seem to be aimed at encouraging more Substack writers to use prediction markets data."
"Prediction markets - also known as betting markets - have been likened to sports gambling. They've made their way into journalism in various ways in recent years. In 2025, Sports Illustrated launched its own prediction platform called SI Predict. In December, CNN made Kalshi - another predictions market platform - its "official partner." Last month, Dow Jones inked a deal with Polymarket to display prediction data, including in The Wall Street Journal."
Polymarket and Substack formed an exclusive partnership enabling Substack writers to natively embed prediction market data into newsletters and Notes via the Substack Editor. The integration replaces pasting Polymarket links by allowing writers to search for and insert market data directly. The features build on a partnership first announced in 2024 and aim to expand prediction market use among Substack creators. Polymarket also joined Substack's sponsorship pilot to support creators integrating these tools, and Substack reports that 20% of its top 250 highest-revenue publications have used the features.
Read at Nieman Lab
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