the bonus-buy lab
Bonus-buy studies
We simulated 100,000 feature buys on each of the most popular bonus-buy slots and measured what actually comes back: the average, the typical (median) return, and how often a buy returns less than it cost. Simulation-based, never predictions.
Across the library, the average buy returns the game's RTP, but the typical buy returns a fraction of its cost, and most buys lose money. The RTP is carried by rare big hits.