"Developed by: Roku"?! That is interesting. The blog post is from 7 years ago, so a lot has changed. I wouldn't be surprised if it was more of someone's pet project and that someone is either gone, has no intention of updating it, or wasn't permitted to spend time and resources on it. It's a major undertaking to update an old channel/app to the new programming model. Maybe it just fell through the cracks. Any channel/app that can't be used with the v11.5 update was automatically removed from the Channel Store recently, so maybe Roku doesn't even realize that it happened to some "Developed by: Roku" channels or maybe they don't care.
I don't know if you'll ever be able to get anything official from Roku. I'm sure they'd prefer that Flickr create their own channel/app.
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