After writing to their sales department which answered very quickly to any question that I've asked, not one review from their customers that purchased anything from them puts a big question mark on this company. When I asked why there are no reviews or feedbacks left by their customers the answer was :

Most of our customers do not want to share information about their purchase. Moreover, our Privacy Policy do not allow us to share customer's data.
You can see the video of working miners on our YouTube channel.

Walter Maleyson.

Precaution should be taken when purchasing anything from them.

What should I do in order to participate in the law suit?