Guides

Start here if you are new. These explainers cover how each product works, what it costs and where it is legal, using worked examples and primary sources.

Guide

Prediction market fees explained

How prediction market fees are calculated, why they peak at 50¢, and what Kalshi, Polymarket US, Robinhood, FanDuel Predicts and IBKR charge at 10¢ to 90¢.

Guide

How prediction markets work

How Yes/No event contracts are priced, how to read the order book, maker vs taker, limit vs market orders and selling early, with worked numeric examples.

Guide

Prediction markets vs sports betting

Exchange vs house, fees vs vig, 18 vs 21, federal vs state regulation: how sports prediction markets differ from sportsbooks, with a worked cost example.

Overview

Sweepstakes casinos

What sweepstakes casinos are, how Gold Coins and Sweeps Coins work, where they are banned, and how the major operators compare, with sourced and dated facts.

Guide

How do sweepstakes casinos work?

A step-by-step guide to sweepstakes casinos, from sign-up and Gold Coins to Sweeps Coin playthrough, KYC and redemption, plus the legal logic behind free entry.