I don't understand how people have so many snack credits left? Don't you drink water? We will drink 3-5 bottles of water per day each so I'm sure we will be buying OOP for many of our snacks.
A lot of people bring their own cases of bottled water instead of buying it in the parks (because they think it's not a good choice for using a snack credit)
Some even have cases delivered to their hotels to avoid buying bottled water in the parks.
And if you're on the DxDDP and it's not hot, believe me, there will be leftover snacks. We were there in January, just for two days, just DH & me...we received 4 snack credits a day, and we were just way too full to eat between meals. Had 8 left when we checked out (meaning ALL of the snack credits were left.)
Now, it was freezing while we were there, literally - overnight lows in the 20's, and daily highs barely hitting the 40's -- so no hot-n-sweaty days for us. Actually not thirsty at all (except for hot coffee with our meals!) And DH doesn't do bottled water anyway (not necessarily "green" about using too many resources for plastic bottles, etc. - mostly he's just cheap

-won't pay for what comes out of the tap for "free"...even when it's Florida water

) We just got yogurt & pastries for our road trip on our last day