You can buy credits with PayPal here. After successful payment the credits will be automatically added to your account and you will receive a confirmation email.

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If you are doing the payment for yourself please login first.
If you are doing the payment for somebody else make sure the username is spelled correctly!

Amount:
50 credits for $50 40 credits for $40 30 credits for $30 20 credits for $20 10 credits for $10 5 credits for $5 3 credits for $3 1 credits for $1

Username you are doing the payment for:

Once again, make sure the username is entered correctly!

If you are doing the payment with credit card or available balance your credits will be automatically added to you after completed payment.