Carnival Casino OBC credit?

[Bases5]

I just booked Horizon 6 day cruise under the Super-Sweet Summer Giveaway-Exclusive Casino Offer .

It's say it comes with $500 non refundable OBC.  Can that be used or not used in the Casino?

Also It's say DOU while playing in the Casino.  Does my DW get DOU while playing?

[ejnsb]

I posed those same questions on another forum.  Everyone agreed that the credit can be used in the casino.  Got mixed answers regarding the drink card for your spouse.  Thry did say that to use that card, you had to be actively playing.  You couldn't,  for example, go to the casino bar and order a few drinks.