there is 0 harm done in doing it x2. If you don't make the spend, you dont get bonus miles. If you don't apply you don't get bonus miles. HOWEVER, if you DO make the spend, you get 50k miles! Either way it will be 1 credit pull.

In regards to the spend requirements....it really shouldn't be an issue. There are many multiple ways of "increasing" spend w/o much or any out-of-pocket costs. Examples include Amzaon Pmts, prepaid visa/mc/amex cards,etc. You can find more examples in the aforementioned "getting spend up w/o the mint" thread.