For the purposes of this promotion at least, perhaps it's a good thing that Southwest doesn't call their points "miles"? This way, Starwood giving both SPG points and WN points isn't doing "points & miles", which Starwood could be prevented from doing (or at least saying) by Hilton? (I'm not sure whether Hilton has legally protected "both points & miles", beyond a trademark on the term I think, or if it's just by happenstance that they have been the only one to do that so far.)