As I stated this is NOT an official Blizzard promotion it is a VERY clever and sinister scam. The e-mail will be sent to you requesting that you fill out a "survey" and then to receive your "Jade Tiger" you must give them your Battlenet information like was done with the Mt. Dew Battlebots.
There are several clues that this is NOT an official Blizzard promotion.
1. The e-mail they send it to you is usually NOT your official Blizzard registered E-mail.
2. The Jade Tiger itself is a CHINA ONLY promotion.
3. If you wade through all the links you will find that they do indeed NOT lead back to Blizzard at all but rather to another site.