The amounts below are theoretical over an undetermined time In general though the higher the RTP, the less you will lose overall
This guide has a complete list of the slots with the highest RTP's and where to play them These will most likely come with a high turnover requirement, of anything up to 100x - By finding the lowest turnover requirement, chances of maintaining any wins accrued will be greater. On occasion it is possible to find truly free spin offers available with no deposit, these are the best as any profit made after the playthrough will be yours, at no risk. The Free Spins I mention here are in the form of spins offered as a welcome bonus rather than those won during normal gameplay. Deposit bonus & Free Spins wins are forfeited 30 days after bonus is credited if the wagering is not met. Free Spins winnings credited as bonus money with 45x wagering & 3 days expiry.
100 Free Spins are given out 20 per day on Book of Dead for 5 days in a row. Wagering required 100% match bonus: 30x deposit + bonus.