Nintendo of Europe has announced a Bravely Second: End Layer promotion. The demo has just been released in the Nintendo 3DS eShop in Europe, and people who download it will get a 10% discount on the full game.
The Bravely Second discount only applies to a future Nintendo eShop purchase, so people would have to get a digital copy to qualify. It will remain in effect until March 10, 2016, so people could grab the 10 hour demo today, wait a week or so after launch, and still qualify for the 10% discount. (Edit: Originally had the dates wrong, due to a misreading of European abbreviated dates.)
Bravely Second: End Layer will be released in Europe on February 26, 2016. There’s been no word as of yet concerning the North American release date for the demo, or if it will receive a similar Nintendo eShop promotion.