The only answer you'll get from Roku is the official one:
Why is a channel no longer available on my Roku® streaming device? | Official Roku Support
Personally, I'd bet a lot of money that they didn't have rights to the content they were showing.
Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution."
If you appreciate my answer, maybe give me a Kudo.
I am not a Roku employee.
