Is anyone going for the Mosaic Challenge? I'm trying to justify if Mosaic is worth it. My understanding is that we get no free upgrades to Mint. You get "free" cancellation and changes, but it's not really free because you get travel credit and not your money back, make it basically the same as Southwest airlines... LOL. So the only benefit besides higher earnings is the ability to "upgrade" to Even More Space using a token amount of points? Am I missing something here?