You lost the 1 BTC bet.
You are essentially playing two games:
Betting on a 10x multiplier
Betting on (x)x multiplier.
You win the 10x mutiplier. 10 x 1 BTC = 9 BTC profit
You lose the (x) multiplier. -1 x 1 BTC = -1 BTC profit
9 BTC profit + (-1 BTC profit) = 8 BTC profit.
You seem to be counting the stake twice: profit = 10 - 1 - 1 = 8.
There's only a single 1 BTC stake.
The jackpot bet is "free" - if you lose the jackpot bet, by rolling anything other than 77.77, you don't lose anything, so the stake must be 0, so the profit should be 10 - 1 - 0 = 9. Not 8 like you're currently paying.
Doog you seem to have recently inhibited an extremely negative attitude towards Primedice. On dicebitco.in's thread you have a very positive attitude and are helpful towards them when pointing out issues you may have. Here you have a more incriminating sort of approach. Is there something wrong you'd like to talk about?
I've been out all day, and was planning to put together a long response to this, showing my recent interactions with PD and with DB, and how my feeling towards each site has changed as a result, but I'm tired and am not sure it would help.
Basically, I feel positive
ly towards both sites, but find that when I point out issues with PD, I am either ignored, or told that I'm wrong, whereas when I point out issues with DB they thank me, and either fix them or add them to the list of things that need fixing.
I recently discovered that PD (1 and 2, not 3) was (presumably accidentally) rounding every bet in the favour of the house, resulting in the actual chance of winning being 0.005% worse than advertised. This will have meant that roughly 35 thousand bets were settled as losses when they should have been settled as wins. When I pointed this out, you told me I was wrong, and when I insisted that I was right, you failed to respond further.
This issue with the jackpot payouts is another one, and the whale yesterday (?) who was reported to have bet 600 BTC in a day, while the amount wagered on the whole site only went up a fraction of that.
It's not that I'm anti-PD - it's just that PD seems to be getting a lot of stuff wrong. You'll notice I'm critical of every other site too when I see them doing things that seem wrong. The difference with DB is that they are happy to respond to such criticism and take steps to address it - and that leaves me feeling better about my experience with them than I do about my experience with PD.
I'm also sad to have had to shut down JD, and that's probably causing me to be more negative in my outlook than normal, and for that I apologise.