That's one day but you'd have to REALLY work it to make it worth it IMO. BOG lunch is also a value esp if you swap drink for soup. but there's lots of much less expensive stuff too and I'd have a hard time not ordering a mediocre dessert I would not have ordered otherwise or ordering more I can eat by swapping it for another side and making it work out in my favor over an entire week.
I do think it was created so that it could be given away (and upgraded) for
free dining with the value resorts. Giving away regular
DDP at those resorts sometimes had people paying nothing for their room!