@Chang Hum
The odds are the same for each bet in each round, 1 winner at round.
Example: 0.10 BTC x 10 Players = 1.00 BTC - Winner: 0.80 BTC
The winner is extract with a random system like random.org, range 1 - 10 per round.
ah OK how come the prize relative to your stake changes, surely as a player you'd be better off doing 2* 10 BTC bets rather than a 20 BTC bet? and do you get your original stake back on top?
Bet 0.10 BTC -> You Win 0.80 BTC *8
Bet 0.25 BTC -> You Win 2.00 BTC *8
Bet 0.50 BTC -> You Win: 4:00 BTC *8
Bet 1.00 BTC -> You Win: 8.00 BTC *8
Bet 2.00 BTC -> You Win: 16.00 BTC *8
Bet 5.00 BTC -> You Win: 40.00 BTC *8
Bet 10.00 BTC -> You Win: 80.00 BTC *8
Bet 20.00 BTC -> You Win: 150.00 BTC *7.5
Bet 50.00 BTC -> You Win: 450.00 BTC *9
Bet 100.00 BTC -> You Win: 950.00 BTC *9.5