I purchased a FanDuel Sports Network subscription and using it on my Smart TV with no issues.
I loaded the FanDuel Sports Network app onto my ROKU with the intent of signing on to my existing account so that I can enjoy baseball on my patio with the warmer weather.
The problem is that Roku is forcing me to purchase a second subscription. I signed up and then cancelled to get the free 7 days while trying to solve this issue.
The email assigned on my Roku device is the same as the one I signed up with on my Smart TV. So, not sure what gives. I'm using a Roku streaming stick with enhanced Wi-Fi.