I wonder if they get any revenue from that.
At the very least there would be some sort of 'arrangement'. After all, there is a monopoly here with a potential audience of over 8 million people. You don't just go putting up a clickable commercial company logo belonging to another business on an otherwise ad free website for no reason.
From what I can see, you need to buy a Roku product which will then allow you to plug it into your TV. This will then allow you to watch the JW TV video's on your TV. This is a great promotion for Roku.