I would need to see the Terms of Service to be able to tell you an answer. Most Terms of Service include a clause that says they can change the rules any time they want and give you notice by posting the new Terms of Service on their website. If you really dislike the new dragon breeding code, try asking for a refund and say you prefer to play the free game since they changed the rules. If that does not work, just stop playing the game and find one with rules you like better. But be aware, other games also change their rules from time to time.
Most things on the internet have a free version and paid versions. Once you are converted into a paying customer, it can be hard to cancel the service. Read the rules carefully and be sure you are actually canceling, so you do not continue to be billed.
Answered on Jul 18th, 2013 at 4:46 PM