Originally Posted by
PWMTrav
Well, given that top tiers in both programs get CPUs, but on AA mid and bottom tier have to burn upgrade certs, I'd say all else equal your odds are the same or better on AA.
Hard to see how paying $30 per 500 miler once your freebie 500 milers are gone (which will only upgrade you 20% of the time) is "the same or better" than paying $0 and getting upgraded 75% of the time like the OP. Is this new mAAth?