The prizes are directly influenced by your turnover and rank level at wolf.bet, hard to say the exact values, to give you an example, we had a Delta player winning 0.015 BTC from 11 BTC wagered at wolf.bet 2 days ago. And he also won the race.
With house edge on wolfbet 1%, someone who wagered 11 btc is "expected" to lose 0.11 btc (1%*11 btc). If he won 0.015 btc from 11 btc wagered on VIP wheel, it's only 0.13% from his total wager amount ((0.015/11)*100%)
From that amount, that player still "lose" 0.11-0.015 = 0.095 btc from 11 btc wagered.