Bonus Booster
Costs 1.4x the stake in play.
Buys a Bonus symbol on the second reel, and nothing beyond that: the rest of the trigger still has to land on its own.
AFK Airport Security bonus buy at 1.4x, 12x and 4,500x
Three published entry prices, and the gap between them is the story: one of them costs under one and a half stakes, another costs four and a half thousand.
Three prices that are not variations of each other
Published as three named options with three published costs. Treating them as a cheap, medium and dear version of the same purchase would be wrong: they do not buy the same kind of thing.
3 Mile High Club
Costs 12x the stake in play.
Buys at least three meter features. Three is the floor, not the quota, and which three is still random.
12 Mile High Club
Costs 4,500x the stake in play.
Buys all twelve meter features at once. It raises nothing else: the ceiling is the same 19,693x it is everywhere.
All twelve lit at once is what the dearest of the three entries pays for.
What 1.4x actually buys
Bonus Booster is the narrowest of the three. For 1.4 times the stake it guarantees one Bonus symbol on the second reel — and that is the whole of it. It does not award a cabin-class round and does not make one more likely beyond that single guaranteed position; the rest of the trigger still has to land in the same outcome.
It is a base-game purchase, in other words, and the other two are meter purchases. Reading it as a cheap bonus buy is the commonest misunderstanding of the three.
A floor of three features, not a quota
3 Mile High Club costs twelve times the stake and guarantees a minimum of three meter features. Minimum is the operative word: the outcome can hold more, and which three it holds is not fixed.
That matters because three effects from different families behave nothing like three from the same one. The purchase guarantees quantity, never a particular trio and never a particular return.
All twelve at once, and what it does not change
12 Mile High Club costs four and a half thousand times the stake and lights the entire meter: Quarantine, Full Body Scanner, Not My Bag, Arm Slides, Class Upgrade, Extra Seat Space, Full Row Booking, Lithium-ion Batteries, Turbulence, Random Security Search, Air-Mile Multiplier and Connecting Flight, all running.
It changes which effects are available and nothing else. The frame is the same five by three, the symbols are the same, and the ceiling is the same 19,693x it is on a minimum-stake spin bought for nothing.
Entry price and win multiplier are different numbers
Three kinds of multiple appear in the same conversation about this game and they measure different things. 12x and 4,500x are prices — what an entry costs, expressed against the stake in play. x3 to x10 are the values Class Upgrade and Air-Mile Multiplier attach to symbols and wins. 19,693x is the ceiling on what a round can pay.
Keeping them apart is not pedantry. A price quoted as a multiple looks exactly like a payout quoted as a multiple, and the difference between 4,500x out of your balance and 4,500x into it is the whole of the transaction.
Paid entry does not move the ceiling
The Captain's Cap ends a round when the total reaches or passes 19,693 times the stake, and pays that. The published probability of touching it is one in 11,723,329. Neither figure changes because the round was bought.
What a paid entry buys is a starting condition — a symbol on a reel, three effects, or all twelve. It does not buy a return, and the published guarantees are all about what is running when the round begins, never about what it pays.
Other pages here
Six addresses, one game, no overlap between them.
Start
every published figure in one place
Numbers
return, hit rate, ceiling
Meter
the twelve effects
Cabin classes
three ways in, seven spins each
On a phone
Android, iPhone, 16:9
Questions about paid entries
How many paid entries does the game publish?
Three: Bonus Booster at 1.4x the stake, 3 Mile High Club at 12x and 12 Mile High Club at 4,500x.
Does Bonus Booster award free spins?
No. It guarantees a Bonus symbol on the second reel; the rest of the trigger still has to land in the same outcome.
Does 3 Mile High Club give exactly three features?
Three is the minimum, not the quota. The outcome can hold more, and which effects appear is not fixed.
What does 12 Mile High Club guarantee?
All twelve meter features at once. It changes nothing else about the round.
Can a paid entry raise the maximum win?
No. The 19,693x ceiling applies to every round however it was entered.
Are these prices in money?
They are multiples of the stake in play. At the published minimum stake of 0.20 the dearest entry is 4,500 times that amount, and it scales with any higher stake.