Fosse76 said: "Maybe they are saving them for Rush/Lottery?"
That or maybe they are going to donate or offer them at low cost to LGBTQ student groups. Looking at the seating chart, only the first row isn't available in the across the entire orchestra section, while only the 2nd and 3rd rows are available to purchase on the left and right orchestra sections, but not center orchestra.
My guess is they will likely be removing the first row of seats for either set or actor comfort purposes, by creating a 2-3 feet gap between the first row of the audience and the stage. The show already had issues with audience behavior at the Hayes and that was very late into its run, as such I would imagine this might be a preventative measure. Then regarding the next to rows, my guess is either lottery/rush or for lgbt student groups.