Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
Now that's the way to do premium subscriptions - Roku Premium Subscription
After the twisted pretzel I had to traverse to get Apple TV+ to work when I'm not an Apple user, I wanted to drop in a kudos to Roku for how it handles premium subscriptions.
I decided to add HBO via the Roku channel. Piece of cake. You already have my credit card info, and it immediately shows up on all my machines. Best of all, you popped the HBO channel out into a separate icon on the main page, making it that much easier to access.
This is the way all of this should work. Well done.
Now, Watchmen and His Dark Materials, here I come.