Let's check out how to apply a promo code.
Promo codes can be applied in the "Promotions" section of your account.
Simply enter your promo code and click "Apply".
Some of the codes can be used before the registration only. That means you have to choose the option "Sign up" and enter the promo code in the bottom field - "I have a promo code". The final step is to press "Apply" there.
The promo code will be applied, and a new bonus will appear in the list - it will be marked as chosen.
Next, you can simply continue your registration.
When all is done, the bonus will appear in the "Promotions" section in your account.
Now you are ready to use your free bonus!