Credits earned during the month of October have been tallied and awarded to those players who invited others and were accepted. Also those players who provided support to the invitees and guided them past level 10 have received their badges as well.
If you are inviting players check your earnings and badges on the My Stats Page of the website.
Keep Inviting your friends, this promotion is not over yet. You get 50 credits per invite. The invitation email is sent periodically for you to forward to your friends.