Just bought my first B&N books in a while, using the free Xfinity gift card from the
Deals thread.
I can confirm that a couple of the downloaded ePubs could not be opened by Sigil due to DRM. But after importing to Calibre, they are DRM-free. So the DRM tools are working.
Incidentally, after buying the books, they didn't show up in the Nook app until I specifically clicked Sync (bottom right, three dots...).