Northwest, always good for the complex-yet-fun promos, has pushed out Miles To Go. (registration required)

Not already a Northwest member? (Members who haven’t already signed up can take advantage for some of these…) Enrolling in the program, opting into their emails, and then enrolling in e-miles.. E-rewards.. and Thanks Again.. Is enough to earn 1500 bonus miles from the program. Other ‘free’ activities, if you arne’t an e-miles or e-rewards member through another frequent flyer program, include taking surveys from each of those two partners. Plus you can take a spin at their instant win sweepstakes for points in the program. Plus, new members can earn substantial flight bonuses, and those flights will earn points in the Miles To Go promo as well.

My only concern, though, is that registering for this offer could conflict with points earned shopping at the Northwest Mall under the other outstanding shopping promo which offers 500 bonus miles for every $50 spent through June 30, since the terms and conditions of that offer state:

Offer not valid with any other offers or promotions except for the special merchant offers mentioned above.

And the Miles To Go terms say:

This offer may not be combined with any other major offers or activities.

So I may have to wait to register for the Miles-to-Go promo until July 1 to ensure no conflict, since I’m not likely to credit any other points to Northwest in the meantime.

Perhaps some Northwest regulars, or those following the thread (which I presume exist but haven’t gone looking for) on Flyertalk have better information that these offers won’t conflict with each other? But I’m not taking any chances until I’m sure, and I won’t have time to research further until the weekend at least.

Update: According to this post on Flyertalk, Northwest will handle the conflict between promotions for shopping purchases as follows:

All qualifying WorldPerks Mall purchases made prior to June 30th would
go towards the Mom’s and Dad’s promotion, as you registered for this
promotion first.Your WorldPerks Mall purchases made after June 30, 2008 and prior to
August 1, 2008 would count towards to Miles to Go promotion.

So I’m going to go ahead and register for the Miles To Go promo now.