They may. Read the terms of the offer -and- this thread:
Yeah, thanks. I remember I saw that when I accepted, and now I'm just wondering if they're strict and proactive with that threat. I know they have the right to.
Personally, I'm going to pay the $450, as some of the benefits definitely cut into that cost. Interesting side note...for the airline spending credit, you have to pre-select one airline to use your credit with. I went to choose AA as my main airline, and the dropdown option read "American / US Airways." Welcome back to life, US Air!