My 3 cents on the topic:
---
I actually commented on a
story and "accused" the author of simply re-posting existing content from another website.
I probably wouldn't have felt as strongly, if he had also created new chapters of his own, but it looked like the author was just copy & pasting the content, and the original story had over 4000 chapters.
Even if he claimed to have permission from the original author to re-post the story: It felt to me like "cheating" the system. He was getting attention, likes, and front-page coverage for content that wasn't his. If the author had continued, we could possibly have a "new" top 10 story by now.
I know it's silly, and if you think about it, "likes" of course don't matter at all in the grand scheme of things. You can't buy yourself anything with likes, you can't eat or drink them. They are like the proverbial "e-peen", a measurement that doesn't really matter, expect to make you feel good from time to time. An encouragement for weak-minded individuals (like myself) to post more content to get their daily fix of likes ;-)
The author replied to my comment with a personal message, explaining that the site, where the "original" story was hosted on, was heavily pay-walled, and that he wanted to make the story available to a wider audience. He wrote that the original author didn't have the time to do it, but gave his approval, and that he also make slight edits to fix mistakes, cut of too short branches that lead nowhere, etc...
Now this made me feel bad. Comments are there to stay, and I almost felt like a bully, who attacked that noble person, who only wanted to help preserve the great work of another for the benefit of humanity.
Still, i couldn't help it. I still felt like my critique was valid.
Nevertheless, I wished the author good luck and motivation with this endeavor. Since then, he hasn't added another chapter to the story. Am i a bad person? :-(
---
Over the past weeks i believe to also have seen many stories, which appear to be re-posts (because it says so in their descriptions). I also have the impression, that those stories don't get updated a lot, and simply disappear in the depth of the chyoa database. They are there, if you explicitly search for them, but otherwise you probably will never see them again.
I know that it is obviously good for the website to have more content. More content equals more potential readers and writers.
Still i don't approve or like the re-posting (as in copying) of stories which aren't your own.
---
Making old stories new again: I have seen this once or twice as well. I guess not a big deal if this happens only very rarely.