The contract asked a binary question: would Strategy (Michael Saylor’s Bitcoin treasury company, formerly MicroStrategy) sell any of its BTC holdings by May 31, 2026? In a Form 8-K filed June 1, Strategy disclosed it had sold 32 BTC between May 26 and May 31—its first sale in years. But because the public confirmation came after the May 31 close, Polymarket resolved the market to “No” after posting clarification language that confirmation outside the window “does not qualify”—dropping “Yes” shares from 80¢ to under a penny. Plaintiffs William Wood and Thomas Bush seek no less than roughly $797,000 in denied redemption value, with claims for breach of contract and deceptive business practices under New York law.

The lawsuit cuts to the heart of the product: it argues a prediction market cannot retroactively change its resolution criteria after the real-world outcome is already known—that “the sale was the event” and the SEC filing merely proof of it. The complaint also targets the settlement architecture itself, arguing that while disputes route through the UMA Optimistic Oracle, the platform controls how questions are drafted and clarified before the oracle ever sees them. Notably, this isn’t a first: Kalshi faced a similar New York suit earlier this year over its Khamenei market’s “death carveout,” and Burwick Law says it’s reviewing additional trader claims—suggesting resolution-governance litigation is becoming its own category.

The House Judiciary Democrats are pushing for a blanket, categorical ban—arguing that because users on Polymarket and Kalshi can openly wager on specific case outcomes and Supreme Court retirement timelines, participation by judicial-branch employees poses a direct threat to the integrity of the federal bench. “Prediction markets appear rife with insider trading and other abuses,” the letter warns. The push follows an intense legislative crackdown on governmental insider trading: the Senate voted unanimously this spring to bar its own members and staff from prediction markets, and the Army sergeant indicted over Maduro-mission bets remains the crackdown’s defining case. The judiciary is simply the next branch in line—and with markets literally trading on which justice retires next, the conflict-of-interest surface is obvious.

World Cup handles are obliterating past records: Polymarket’s single World Cup Winner contract has quietly topped $3.9 billion, surpassing its own historic 2024 presidential election handle as the largest event contract ever—with the quarterfinals (France–Morocco Thursday, Spain–Belgium Friday, England–Norway and Argentina–Switzerland Saturday) still to come before the July 19 final. Track full pre-match pricing on our World Cup odds page and follow where the money is moving via our World Cup public betting splits.

The pseudonymous trader “coldsway” has officially lost $11.6 million in just over a week, sporting a brutal 26.7% win rate. The account was wiped out by heavy-favorite bets that backfired—including the massive $4.9 million wager against Morocco on July 4 (the Atlas Lions won 3–0 and now face France in Thursday’s quarterfinal) alongside multi-million-dollar losses on Spain and Portugal positions through the Iberian derby. In a tournament where Norway eliminated Brazil, Cape Verde nearly toppled two giants, and Switzerland advanced on penalties, chalk-stacking has been the single most expensive strategy on the board. Watch where the public is piling in—and where the contrarian value hides—via our public betting splits and World Cup odds pages.

Crypto.com’s stated 40x weekly growth in its prediction markets business over the six months preceding the February OG spinout is the most aggressive publicly disclosed growth rate in the category. That figure came from the launch press release and was repeated by CEO Kris Marszalek—it hasn’t been independently validated by a third-party panel, but it’s the signal that triggered the standalone product. If OG is now running its own independent growth curve post-spinout, it would be the fastest-emerging challenger on this list. Independent download and DAU data for OG is not yet visible in public Sensor Tower or Similarweb previews.

Polymarket’s global web rank has climbed from 940 to 836 over the past three months. February traffic was 32.5M visits (up 0.79% MoM), March jumped to 45.3M as the Iran war markets spiked. Direct traffic is 74.17% of desktop visits—a sign of strong brand-driven return traffic, not paid acquisition. Top audience overlap: CoinMarketCap, Kalshi, TradingView, Claude.ai. U.S., India, and Israel are the top three visitor countries.

Kalshi jumped from 7.1M visits in November 2024 to 13M in March 2026—an 83% increase that roughly matches the platform’s trajectory since the 2024 election. Direct traffic is 66.06% of desktop visits. Top keywords driving organic traffic include “kalshi,” “kalshi texas senate,” “polymarket” (interesting cross-search), and “kalshi bracket challenge.” Audience overlap: polymarket.com, espn.com, 270towin.com, DraftKings sportsbook, FanDuel sportsbook.

Citizens JMP Securities reported Kalshi accumulated approximately 1 million app downloads during the NFL playoffs alone—their highest 2-week download market share in platform history. Across the full NFL season, the estimate is roughly 4.4 million downloads, putting Kalshi in the same rough band as FanDuel and ahead of DraftKings in that window. This is the single best third-party download validation currently available for any prediction market platform.

Per Sensor Tower, Kalshi saw an 18% MAU increase in Q1 2026 while traditional sportsbook operators saw declines. This is the first quarter where the displacement effect of prediction markets on sportsbook revenue has been quantified at the panel level. Nearly 30% of Kalshi MAUs also used Robinhood in the same month in 2025—a strong audience overlap that has since deepened through the formal Robinhood-Kalshi brokerage partnership. This cross-audience dynamic is a meaningful moat for both platforms.

From Robinhood’s Q4 2025 investor letter: 8.5 billion event contracts in Q4 alone, 12B+ across the full year, 1M+ customers. Q3 2025 event contracts “more than doubled sequentially” to 2.3B. The Robinhood-Susquehanna MIAXdx acquisition (closing Q1 2026) positions Robinhood to capture this volume on its own exchange rather than routing through Kalshi, which would be the most significant structural shift in the category if it plays out as planned.

Similarweb public page traffic estimates; app store ratings, review counts, version updates; Polymarket Analytics and Kalshi API public market data; Sensor Tower public blog posts and State of Mobile reports; company press releases; SEC filings and investor letters for public companies (HOOD, FLUT, DKNG, CME, COIN); news coverage citing Sensor Tower, Apptopia, or Similarweb data; Google Trends search interest; Reddit subreddit growth.

Precise monthly downloads by app by country; DAU/MAU time series and retention curves for any individual app; cross-app audience overlap at granular level; ad spend and creative intelligence (Pathmatics); in-app purchase revenue for specific SKUs; historical traffic data beyond the current Similarweb preview window. For these, the free Sensor Tower pop-up at app.sensortower.com gives a last-month snapshot that we can screenshot into the briefing manually.

Run this report every Monday covering the prior week. Refresh the leaderboard, challenger tracker, and Sensor Tower/Similarweb signals automatically. Every 2–4 weeks, supplement with a Sensor Tower free-preview screenshot of the 4–5 most-watched apps for a fresh download snapshot. Quarterly, pull public company earnings data when HOOD, FLUT, DKNG, and COIN report to refresh revenue and contract-count numbers.