A very simple example is that I received $200 rank up bonus for $250k wager in other casino but I received more than $350 if I remember it correctly in duelbits for the same wager.
I have the same experience at other casino with such wager. Based on my experience, some other casino bonuses used to be better in the past. But now they have changed their bonus parameters and giving low bonuses. There is no way to verify the bonus amount as they don't disclose the bonus calculation system. But everything is transparent at Duelbits. They have written each bonus percentage amount in the Ace’s Lounge page. I haven't played much at Duelbits before, but now I'm thinking to increase my gambling activity at Duelbits.