got an email from them that its only for malaysia....
Thank you for your interest in Rilax Zzz, a natural sleep supplement. The free sample is only available to residents in Malaysia and Singapore. At the moment, the product has not been made available in USA and Canada as yet. We are looking in it, and will keep you informed should the product be launched in that market in the near future.
We apologise for the inconveniences caused, and would like to comment that the posting on AZ Free Stuff website was done by a third party, and not by us.