The developers could have made it much better by:
1. Adding the day!
2. Adding the rain probability %. It is hard to understand the clouds.
3. Increasing the tiny size.
Now members are saying it is tied to one screen saver.
Can I cancel? Can the $9.99 that I paid be returned?
I'm unsure what you are using for the weather screensaver. When I look in the channel store, I see one with a subscription, not a flat fee. But odds are the channel/screensaver is not a product of Roku themselves, so you would need to take your issues to the developer. Since I don't know exactly what product you're using, I can't point you towards the actual provider.
This is an add-on bar that lays on top of a screensaver. Top right corner. Monthly charge or lifetime for $9.99. Billed through Roku.