Indeed -- for my situation consider where my money would have actually been otherwise, I am paying 0.7cpm through BankDirect. I'm not that excited about paying for miles, even that this rate, when I have no specific use for them but I'll try it out for a bit and perhaps go for the million mile mark (though it sounds like that *may* go away soon).

And of course, as other opportunities come up it may stop being worth it, considering I'm already on the fence. Higher interest rates, more willingness to play the stockmarket or other investment opportunities makes a pile of cash being used for aamiles that much more expensive