Tom Cummings is a former problem gambler who has turned his attention to gambling reform and the industry in general. Big Kahuna — One of the older bonus video slots, you could win one of two different picking games.cemonline acc au GAMBLING ONLINE GAMING SLOTS How do pokie machines pay out their players, and at what rates? We explain the return percentages, house edge odds and popular. Modern pokies all have a feature assigned to them by their manufacturers or the auditors that test them; a theoretical payback percentage. This is one feature. Every poker machine can meet its “rate of return” requirement while still leaving the Photo: Man playing pokies in Sydney (Mick Tsikas, AAP).