I would NEVER be able to eat three meals a day at WDW. The basic plan works just great for us. If I was to do the platinum or deluxe plan you would have to ROLL me out of there after a week! I could probably do it for a day, maybe 2-after that, I'd be sick!
Plus as others have said, paying all that $$ I would feel like I had to go from restaurant to restaurant to get my money's worth-taking valuable time away from touring the parks!
More power to those who like to do that-I'm just as happy with my 2 meals a day plus a snack!!
If I would win the lottery I may try the platinum plan just once.....to try all those signature places without worry!