I have read the meta posts FAQ proposal: Back It Up and Don't Repeat Others and What can we do about me-too answers?. It is clear that repeating what is already covered in other answers is heavily discouraged here. It is somewhat ambiguous (to me) if this only applies to other answers posted here or to content copied from other websites as well.
Assume that the answer gives proper attribution to the source with a link, so plagiarism is not my issue here. However, the entire answer consists of text copied from elsewhere. There is no additional commentary or contribution from the author.
I would like to hear if the community considers such answers useful. (I have refrained from posting a specific answer as an example, but if it is really necessary to answer this question, I will add it.)