They've beaten Valparaiso(1-4), Savannah St (0-5), Portland St (0-5), and Idaho St (2-3).
I'm not saying they're not better than us right now, but they've proven nothing so far.
Also worth noting EWU played 2 FBS games in 2012 and 2013.
Regardless, NDSU has their scheduling philosophy, they can afford it, and it works for them.