ah - thats sort of what I thought you meant..... but, lets do a little math here (and try to keep the numbers simple)

assuming 15k spend on 35 nights
(we will ignore promotions, etc since they really dont have an impact on this - and we are just picking which cc to use_

1. BOLD - 3x which is 75k points
annual fee - zero
2. BOUND and others - 6x which is 150k points
ranging from 99-250$
3. UA Credit 2x = 30 miles

and sure an extra 75k is nice - but I have to pay for it