It would be a bit surprising if Newark & Camden students are treated exactly the same as NB students as a portion of their student fees support athletics programs at their respective campuses first. That said, it would make sense that they're offered an opportunity to obtain tickets for NB athletic events and a mechanism to do so outside of the general public. Priority is likely offered to NB students and certainly if they don't absorb them or wait longer than a certain cutoff, it's great that they are made available to the other two campuses' students.
I wonder how many Newark or Camden students actually bother, especially if the football team, for example, has not been particularly competitive. I could also see that a subset of those not even coming to games to root for the home team but rather potentially being closet bandwagon jumpers of PSU, OSU, UMich, etc.