There were a few different things offered but free race change certificate for everyone was not one of them. Those offers are/were (quoting from the news):
All players will be able to receive a special gift from the elders Baguron and Verkiry by completing the quest "Cataclysms in the World of Faeo".
Players whose name was not unique as a result of the server merge, will receive a "New Name" Certificate in the near future
For transfer from Magmars to Humans only: A document confirming your right to use the service to transfer your clan to another continent. Magmar players will receive a discount of 50% for race transfers when using the clan transfer service.