exacty Peep2
imo , JET Blue and Delta appear to be more devoted to their Dominican Routes.. and have a very steady and Loyal Clientele.
UA out of EWR NJ does not seem to care (I live in nj and almost always have to travel to JFK ) , and before when they were Continental out of Newark, they cared even LESS about being competitive. their model seemed to be the LEAST amount of Flights, and the Highest Prices for those who for some reason HAVE to fly out of EWR.
ticket prices were often $900- $1,100 when the exact same flight cost about half that out of NY (Jfk) . not bashing United, but they just dont seem to consider the route important unless they can sell premium seats as you said, and just enough to fill ONE plane a day, and not even 7 days a week.