Disney doesn't prorate annual pass upgrades, so it's not surprising they won't prorate this. Since there is daily pricing though, you can get your prorate that way. Until you want to use it more than 7 days the $10 per day per person pricing is better, so for those who are already deep into their pass year and want the service, that's an option. I personally will want to see how this system works and if the benefits are anything other than what we are all perceiving them to be before I would choose to pay for them. I have no issue with walking from attraction to attraction and park to park to get our fastpasses. I actually love my 18,000-27,000 Disney steps per day because they at least make me feel less guilty about not always (ahem, not often) choosing the healthiest food options.