Netgear Nighthawk AC1900

I recently bought the Netgear Nighthawk AC1900 router. I am already using Disney Circle and already have the stand alone box that Circle sells for $99. It appears that everything I'm already getting for free will now cost me $5/month if I use the Circle that is integrated into this modem. Am I understanding this correctly? So, should I just continue using Circle the way I have been with the box that I already purchased from Disney for $99??? It would be nice to just use the integrated Circle from the modem, but I certainly don't want to start paying for something that I'm already getting free. Can someone reaffirm that I'm understanding this correctly? Thanks