Disney does if you're willing to invest more money up front. You can buy a 10 day non-expiring ticket. This is really a best deal if you add the water park option. We have a stash of these tickets that work out to about $25/park day (either main park or water park). We value the main parks and water parks the same because we spend a full day at either. I just checked at
undercovertourist and this ticket is $526 today, so that's just over $26/day at today's prices. Really quite a bargain, I think but I realize that not everyone enjoys the water parks like we do, and not everyone could spend that much money in advance for trips that may be years in the future.
If you just aren't a water park person, a 10 day non-expiring base ticket is $484, so $48/day. For the cost of 1 day at the water park ($42) you can add 10 water park days, so that seems like an easy decision to me.
Just turn into a water park person to get the value!