I wonder how I can improve this question. Unfortunately, I cannot ask it as a comment as the post is locked.
By how, I mean in terms of content (what is unclear?), as well as technically (how can I edit the question since it is locked?)
Title: Do some publishers offer to host a mirror of webpages used as a reference?
Body: Using a link as a reference is often problematic as the link might disappear at a future time. However, the content might be of high relevance to the reader, so it might be worthwhile to add it as a reference. Do some publishers offer to host a mirror of webpages used as a reference?