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You reach your levels faster with dice but keep in mind that overall you will lose your money meanwhile if you try slot machines and bet on them like Sweet Bonanza without buying the bonus you have a chance that while you level up to win additional amount of money,big amount of money if you are lucky which you can continue to use towards your next VIP level,I have tried Sweet Bonanza and if not for my greed to get rich faster I would be already Gold or Platinum while I am just 60% Bronze right now only because of my greediness.
The idea is just to get faster way to reach the next level while we are few percent remaining (under 5%). In this case, in house games is far away better than 3rd party games. If we are talking about the chance of additional winning, plinko can be the best alternative. I will avoid slot for wagering purpose because it is a slow game and risky game. Only those who have big bankroll will be risking money on slot games for wagering purpose,,I am not that type of gambler so I'll prefer to play in house game with lower house edge.