What are these Saveclicker links on one page?

Hi,

On one of my client's sites I found a page where links are all marked as "saveclicker".
When you put your mouse on a link you can see "Click to continue > by saveclicker".
When you click, nothing happens.

My client doesn't know what it is.
I think it's only on one page.

Any idea about what this can be?
Thanks!