I'm suggesting to have wagering requirement does not mean that I'm against free bonus that can be claimed by all users. Back to possibly abuse attempt for the bonus code, I'm sure duelbits is aware enough for this and I'm sure duelbits have their own way to prevent it. My main point is to suggest combination between 100% free bonus and bonus with wagering requirement because I think it will be more effective to attract new players as well as to make them play with what they get and hopefully these new players decide to deposit and become active players. Having free bonus code most of the time is good to attract new players to come but I doubt that those who come because of free $2 will be active players.
I would say that it would give people a reason to wager more, and that would be a good thing for duelbits, and it would also be the same amount totals, but for fewer people, or at least based on how much they have gambled and that means more money for some of the customers as well.
The only people who would be screwed by this idea is the people who do not wager much, just like me, I rarely wager over a dollar for any bet for example, but even I am fine with it. Why? Because I know that casinos are a business, and they need to realize that they have to make money from things and that is why it would be something quite good for them to get more people to wager.