Yes, Bandini, you have hit the nail on the head. I, too, was wondering about the number of disabled guests who will surely take advantage of this offer. I'm not talking about the ECV people, but the "mobility challenged" people who have difficulty just walking to the security check in point in each park. I can see this option as being a great opportunity for someone who has difficulty walking the long, long distances to the park entrances. I include my husband in this, as he has a difficult time walking this far due to a back injury with nerve damage. He is going to use a cane and an ECV while in the park, but not all the time. I see this option as an answer for many people who can't walk that far or those that don't want to walk that far, and are okay with missing the "show" at the entrance. Also families with little ones who can't walk very far could see this as a cheap advantage. The possibilities are endless for usage.
Personally, we would not do this. We enjoy the entrances of each park as part of the Disney experience. However, with the cost of $l5.00 per person it would be $30.00 for the first day and 24 for the other 9 days while at the park; pretty cheap alternative for us, and for many others I would guess. I wonder if this is going to backfire on Disney with increased usage and increased wait time for the buses. I can see this system getting overwhelmed, but will wait to see what happens.