You can not use Adwords to send people to your (standalone) aStore; that is, the one with the astore.amazon.com domain. The reason, although they don't say so, is that you would compete directly with Amazon, and your ad could block theirs since they are at the same domain. You may use Adwords to send people to a page on your web site, in which you have the aStore embedded, or which contains a link to the standalone aStore. You must do one or the other. Amazon does not permit aStores that are not associated with web sites. (This is a fairly new requirement, and is probably also related to their own advertising goals).
I think not allow to do that.Because astore is a sub-domain of amazon.com If you send traffic from PPC to your aStore its like to send to Amazon.com as well. .