We are having more and more problems with the content becoming repetetive and stale. The biggest reason for this are users that just copy funny stuff of the internet or bluntly repost what other users posted.

I saw the same effect in other communities I participated as well (9gag is pretty much the most extreme case with 9/10 posts being some form of repost:

• Exactly the same post (stolen from another user or reposted from another platform from different users)
• Same post in slightly different way

This is why I left the platform and this is why a lot of people get bored. On the other hand the praise and engagement they do get (on 9gag as well as in my community) show that there are still a lot of users that really cherish the content.

What are counter measures you know of without?

Note: We do have up and down votes and also a reputation system much like stack. Unfortunately this is also part of the problem as people who repost get a lot of upvotes for it and that is why they keep doing it. I have somewhat limited control over the software.