What are you buying
Buy Bonus (also known as feature buy, bonus buy) — instant launch of the bonus round, usually a series of free spins, without collecting the trigger on the reels. The price is fixed and expressed as a multiplier of the current bet.
In Luxoreel, the price is set in the theme's math config as a multiplier (buyBonusPriceX): for example, 27× the bet. You place a bet of 10 — the purchase deducts 270 credits and guarantees a free spins trigger.
Price and RTP
The purchase price is not random: it is calibrated so that the RTP of the purchased bonus stays within the target range (target ~95% ± tolerance, verified by simulation over millions of spins). Buying does not make the game more profitable in the long run — it changes the variance.
What really changes is session volatility: you pay more per spin, but you see big events more often. It’s a matter of pace and preference, not mathematical advantage.
When it makes sense
Buy Bonus is convenient for quickly seeing the ceiling of the theme: what free spins look like, what multipliers and maximum payout are. For learning and evaluating the theme, it’s faster than catching scatters.
In demo mode, buying a bonus costs nothing in real money — the best way to explore the slot's maximum potential without risk.