Plagiarism - is it fashionable?

Today, walking across the expanses of the Internet, I accidentally found the site wishroll.com and was greatly surprised by its similarity with mywishlist.ru

But what was my surprise when I found on this site a copy of my profile with mywishlist.ru ... What's more strange, the password with mywishlist.ru successfully came up to wishroll.com (albeit on the first one it was successfully changed). First of all, I wrote a small letter to the guys from mywishlist.ru, because it may be their initiative to make an English version of their service, aimed not at the Russian-speaking audience. But this option was dropped after I checked the "symmetry" of users. Most likely all the sources and databases were simply stolen. Or maybe it is "not honest" providers?
')
In general, there are a lot of questions about how such a situation has become possible, but it’s interesting how to act in such situations, because not a single project is insured against this.

PS Does anyone know such cases, where not only the design, but also the data was copied under the tracing paper?

Update: Still, it was not plagiarism. Here are the answers from the wishlist:

No, not plagiarism. This is a multilingual version, still alpha.