What is it?

This is a way to view satellite pay-TV, but not quite "officially". For example, if the desired channel (or channel packages) are not officially sold in your country. Or, for example you just want to get the same service, but 10 times cheaper. (For details, you can in this article. Or look on the Internet, the key word - "cardsharing".)

I repeat! You should be aware that it may be illegal in your country. if the provider sell its services officially, you should not break the law!
But in fact - buyer assumes no risk.
Servers are not under the jurisdiction of the EU - is the key to reliable service.