the 70% of profits from less than 1% of users is the number that should end this industry in its current form. traditional sportsbooks are structurally identical to casinos at this point, the odds are stacked against the user and the concierge model is predatory by design. prediction markets (kalshi, polymarket) are different structurally because theyre exchanges - zero sum between traders, not house vs player. the vig is lower and theres no concierge calling you at 2am. whether that makes them 'better' or just 'differently harmful' is the real debate