Here is their reply. At first glance I thought they were saying "no conflict" in the terms and conditions, but after closer examination it seems they are saying no conflict in getting the miles.
Thank you for contacting SpaFinder!
There is not conflict in using a SpaFinder promotional code and receiving the Delta promotion.
Feel free to reach SpaFinder at 646-695-0575 should you have any further questions or concerns.
Best Regards,
SpaFinder, Inc.
------------------
From: [name and email removed]
Sent: Wednesday, May 11, 2011 3:56 PM
To: CustomerService
Subject: Delta SkyMiles promotion
For the 40 Delta SkyMiles promotion, can I use a promotional code to get a discount of 10% off of my total order as well? There are two terms in the Terms & Conditions that have me confused about this:
* Items purchased at a discount will earn miles based upon the actual cost of the item, not the original, non-discounted price.
* Offer cannot be combined with any other promotion.