What premium channel are you subscribed to that costs $8 a month? I’ve had my Roku’s for more than 2 years and don’t pay any subscription fee.
I suggest you log in to your Roku account www.roku.com and check your user settings to make sure you’re not paying for something you may not want.
Netflix. We have a subscription with them (we could also watch their content on the computer, if we wanted to).
I don’t pay for any of the other channels on Roku, I understand that they’re all free.