To be honest, I'm sure if the preview is used for anything other than the featured notebooks, but it matters for those: it wrongly gives the suggestion that a collaborative work was created by a single author.
Suggested solution:
Listing all authors can be an issue in the limited space (keep in mind I've used comically short names in the screenshot). But just adding "et al." or "and others" would be fine in my opinion - just to make it clear that this is not the only person involved.
This is a tiny feature request for the frontmatter-based preview!
When you have multiple authors, the preview will show only the first author in the preview:
(Notebook used for this screenshot: https://gist.github.com/lukavdplas/2f06ccf359994dd5c9593afcf1040904)
To be honest, I'm sure if the preview is used for anything other than the featured notebooks, but it matters for those: it wrongly gives the suggestion that a collaborative work was created by a single author.
Suggested solution:
Listing all authors can be an issue in the limited space (keep in mind I've used comically short names in the screenshot). But just adding "et al." or "and others" would be fine in my opinion - just to make it clear that this is not the only person involved.