It looks like you have a different offer for ATT, thats why its YMMV.
But the offer does work. I found it on the myfico forums, and some people already got the cb posted.
Worst case is , if it does not post, i will return the 2 orders for a full refund.Or file price protection for the lowest price(with price from amazon etc) , or file return protection with BOA. I need the sensors anyway.
Lots of option when you have good credit cards 
If it does post, than free sensors or whatever you order.
Ive did this with discover and amex before many times when they have CB deals like this, and it worked all the time, whatever you ordered, they can only see the merchant code and thats what they check.
My black friday dell.com order with amex got me 2 motion,2multi,1 presence for $13 and some change.