Yeah, it's an hour from 7A and 8 to the Rock, so exit 4's going to be quite the trek.
But Toms River is Rags+Devs country and it's 75 miles from the Garden.
Toms River is that way because much of the population is transplants from North Jersey and Staten Island. It is an NYC exurb. People who because of large family or personal preference need big, cheap houses that they couldn't afford closer in live here, trading real estate prices for a longer commute. Going to Philly from Toms River involves rural backroads. No highway from Ocean County to Camden/Philly. NYC has the Parkway as well as the North Jersey Coast Line.
My guess is they have few enough seats available that they expect between walk-ups and the $10 ticket line and a few strategic "surprise free upgrades" to fill most of those seats, so they are calling it a sellout.