Observed arrival · 2026-11-12
PredictMeNot puts prediction-market costs on the table
A free, no-account guide to prediction-market fees, bot claims, settlement rules, and trading results on Kalshi and Polymarket US, with a cost simulator.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- People weighing prediction-market trades or checking bot claims
- Worth noticing
- The site says a “buy at 45¢, sell at 70¢” rule lost 9 cents per dollar across 689 recorded Bitcoin markets.
Field notes
The simulator lets readers vary venue, fee tier, contract price, trade size, trading frequency, and bankroll, then estimates fee and outcome scenarios. Its research section reports tests of specific trading rules, including a 689-market Bitcoin example; the homepage says its figures link to data and code. These are claims visible on the page, not independently verified results.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
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