Upgrade

The rules

• Choose one or more prizes from your inventory and a multiplier from 1.01× to 9,500×. The chance of winning is 95% ÷ the multiplier: 47.5% at 2×, 9.5% at 10×, 0.01% at 9,500×.
• Lose, and the prizes you staked are gone. Win, and you are paid what they were held at × the multiplier.
• A win arrives as the most valuable prize in the catalogue that fits inside the amount, and the rest of the amount is paid to your balance: nothing of it is lost. The page shows that prize and the rest before you confirm.
• Every multiplier returns 95% of what is staked, on average. The other 5% is the house's.
• A prize is held at an amount of the coin it was won in. It can be sold for exactly that amount at any time, with no fee, also during a break or an exclusion: selling is not a bet. Nothing is shipped.
• An upgrade that could pay more than the site's ordinary $250,000 maximum, up to $10,000,000, is taken with a real coin only while the house's own funds would pay it in full, in that coin; otherwise it says so and takes nothing. Play credits can always take it.

How the result is worked out

• u = the first 52 bits of the byte stream, from your own seed pair like a dice roll.
• Win iff u < floor(2^52 × 9,500 ÷ (multiplier × 10,000)). The chance is rounded down, never up.
• Payout = stake × multiplier, where the stake is what the prizes you staked were held at.
• The prize a win arrives as: the most valuable prize of the catalogue worth no more than the payout; among prizes of the same value, the catalogue's first. The rest of the payout is balance.

Every upgrade has a receipt, and any of them can be checked in the verifier from your revealed seeds. Terms for prizes