I did this offer a few months ago and received 5 magazine subscriptions for 500 US AIR miles. My wife did the same offer.

About a month later my USAIR account showed a -6,000 mile balance. My wife's showed a -2,800 balance. I was upset, but didn't bother calling them since I don't use that account.

This week our accounts show the negative balances are back to 0 miles. I guess it was some accounting issue with the magazine subscription service.

I also received the Continental offer, but with 2,500 miles in those accounts I didn't take up that offer.

It is nice to have 10 magazine subscriptions for 1,000 orphaned miles. Although I am sure I will start using the USAir account now that they have joined Star Alliance.