I was copy-pasting some text from a website and besides the text I copied, the following text was appended "Read more at: http://www.YYYY.com Copyright © YYYY".
My question is: "WHY?" It gives a user the trouble of removing this last part. (I would never paste it as is.) It's frustrating.
What usability purpose does this serve? Is there a specific UX reason why people would do this? Is there information about the pros and cons?