Yes it is enough for you to invite of the friends with the bond to
indicate in your profile "Invites your Friends one Urban Rivals and
earn free Credits!" and to copy your bond to indicate for to send
has your friends.
The Urban Rivals team is made by lovers of all kind of Collectibles Cards Games and Trading Cards Games like: Magic the Gathering, Dominion, Vampire, Yu-Gi-Oh!, Pokemon, Wakfu TCG, Assassin Creed Recollection, Shadow Era, Kard Kombat and Might & Magic Duel of Champions.