Polymarket, a predictions market built on the Polygon blockchain, saw an explosion of usage leading up to the election, peaking at over $3.2 billion bet on the election, orders of magnitude more than pre-election volumes. Compared to other prediction markets, Polymarket charges no fees, allows seamless trading in and out of positions and is decentralized, meaning anyone can trade directly with the underlying contracts on-chain via the API (allowing for anyone to make trading bots) and anyone from a non-blacklisted geography can access the website frontend.