Product investigation: which formats do we want the Preferred Source button to appear on?

[SiAdcock]

This button was put out in a hurry. While we got a large enough bang for our buck by filtering out a handful of weird and wonderful ArticleDesigns, we probably want to ask whether there are other designs we want to support or exclude.

For instance:

• Should this button appear on LiveBlogs/DeadBlogs, which are usually quite news-y and high traffic?
• Should we exclude this button from crosswords, which are definitely not news-y
• Should we add this button to Opinion pieces, which are often news-adjacent but less likely to appear in news-related searches