Will they give me bonus if I invited a friend to sign up?

https://www.ether-arena.com/

Ether Arena is not a licensed or regulated broker even though it states offers that look good to be true. Ether Arena presents no details of its regulation but only shows its office address is in the Marshall Islands. It needs to be mentioned that the Marshall Islands does not have any authorities that issue licenses for forex trading or regulate forex activities. 

Besides, the Spanish National Securities Market Commission (CNMV) issued a warning that this firm has not been authorized to provide forex investments and services. You can check the full warning from here.

The truth is, Ether Arena is not overseen by any regulators. That means your personal data or your funds in this broker are unsafe and cannot be protected by any law. We would recommend traders stay away from unregulated brokers like Ether Arena and trade with licensed brokers.