I don't know, lunch is still available for my vacation 6/22-7/5, but dinner is not. When a dinner did pop up on 7/4 it was for 9pm. Not sure who would eat at BOG rather than watch the 4th of July fireworks after putting up with those crowds all day who are there specifically to watch the fireworks, but someone snatched it up.
Luckily, I was able to get a dinner reservation from a nice DISer on the cancellation boards for a day we'll be in the MK.