Should We Use a Bonus Buy or Booster in Slots? The Ultimate Guide

I ran millions of spins to find out what boosters and bonus buys really do

Introduction

Most modern online slots come with built-in Bonus Buy features — and in many cases, multiple types of bonuses are available for purchase. Prices can range from 50x your base bet to 1,000x or more. On top of that, many games also include boosters or enhancers that increase your chances of triggering a bonus or landing a big win.

These features are widely used by streamers. The more expensive the buy or booster, the more frequently they’ll hit flashy wins, generate screenshot-worthy moments, and produce content that grabs attention.

Among regular players, opinions are split. Some swear by Bonus Buys and boosters for the adrenaline rush or perceived +EV, while others avoid them entirely — citing risk, bankroll management, or game flow.

In this guide, we’ll strip away the hype and break things down mathematically. What exactly are you getting when you buy a bonus or activate a booster? When (if ever) is it worth it? And what are the long-term consequences of using these features?

Let’s dive in.

Boosters

Flight Mode by Nolimit City offers 5 Bonus Buys, 5 Boosters, and (in almost all cases) the option to buy extra spins.

Just look at this screen: five different Bonus Buys, five boosters, and in every case — except for God Mode — you also have the option to buy extra spins. That gives you 21 different ways to play this one slot. And depending on which path you take, the experience (and the math) changes dramatically.

Let’s start with the base game — the simplest form of play. No boosters, no Bonus Buys, no extra spins. Just click spin and see what happens.

I ran 9,290,596 demo spins to find out. No, I didn’t waste years of my life doing it manually — an algorithm handled it just fine.

During that time, I hit 4 max wins, giving a hit rate of 1 in 2,322,649.

That’s actually better than the provider’s advertised 1 in 2.9 million — but it’s just variance. With a bigger sample size, we’d likely see it regress to the mean. If we wanted true statistical precision, we’d need hundreds of millions of spins.

Volatility came out to 8.71 — slightly higher than betting on a single number in European roulette. But everything is relative.

Next, I ran the same kind of simulation for the other boosters and summarized everything in a comparison table.

Average number of spins required to hit a win greater than the listed multiplier across different booster modes in Flight Mode slot.

Here we can clearly see that boosters reduce variance and increase the odds of hitting a max win. With the most expensive booster enabled, a max win occurs once every 105 spins on average — but the cost of each spin also skyrockets to 270x your base stake.