On the writing site called Hubpages they had a thing called hubhopping. This was a practice in which contributors were invited to judge the work of other contributors. This sentence alone should send up flares.
But it didn’t.
<a href="https://www.youtube.com/watch?v=BwKaYku9mew" target="_blank" rel="noopener">Source</a>
For years, the Admin allowed this practice, nay encouraged it. Although one might say that this would help improve the site, that is not what it was used for.
The actual use of Hubhopping was to, get really good articles unfeatured. When an item is unfeatured it is Not visible.
<a href="https://hubpages.com/faq/" target="_blank" rel="noopener">Source</a>
Hence, when a hopper found that really good item, s/he would copy it to their own computer, vote down the article on Hubpages, get it unfeatured, then publish that plagiarised article under their own name on another site.
The Good Writer who had written that article, puzzled why it was unfeatured. What was wrong with it?
Some would check the spelling, the grammar, rearrange a few words, and resubmit. Others would leave the site. Most of the really good writers left Hubpages.
Those who resubmitted would either be unfeatured again by the plagiariser, or, if the person who stole the article was not quick enough, the original writer would learn it had been rejected for plagiarism, and be directed to the ‘original’ that is the item they wrote which another person captured. Then, make the complaint.
For over six years Hubpages persisted in this policy, before realising what was happening.