Referral codes aren't really for bonuses...they are for tracking players and how they signed up. Webmasters register to be affiliates of gaming sites and get bonus codes to offer on their sites, these codes simply link that player to that website. The website then gets credit for signing you up. More than likely you will be able to use this code for as many people as you want. Good luck. :)

I got €25 back and withdrew them to my card without any problems.Obviously the code works. The question can be closed now, thank you Gamer88.