Please don't attack me, Smart Shopper. I don't look for ways to circumvent the rules, nor do I call customer service until I get the answer I want. I was merely sharing my personal experience, which indicates that various offer codes can often legitimately be combined in a single reservation. The fact that the online check-in form has space for up to 3 offer codes certainly would support that position. Perhaps the issue is with the definition of the term "promotion." While the T&C state that "promotions" are not combinable, I don't believe that all offer codes (particularly G bonuses) constitute uncombinable promotions.