supercheval, the following statement applies directly to your question: "Each deposit and the resulting bonus must be wagered to extinction or withdrawn, prior to making your next deposit." It would be my understanding that this means you must have a $0 balance (either because you lost it all or withdrew your balance) to be eligible for a second (third, fourth, or fifth) deposit bonus. Hope this helps!
Additionally, I forgot to mention that
CasinoCashUnlimited.com offers a $115 payout ($100 minimum deposit + you must accept the bonus) for Lasseters Casino. We generally offer a $115 payout ($100 minimum deposit + you must accept the bonus) for AusVegas Casino as well, however, the offer has been removed for the remainder of the month as AusVegas has exceeded their budget this month.