Think about it. You create a Yahoo account, go to a site which apparently doesn't belong to Yahoo (it's privacy statement redirects you to the real Chinese Yahoo domain), then you add the originator to your contact list (therefore notifying him that you fell for it and giving him your Yahoo id), then log-in to this possibly fake site with your id and password, and magically this Chinese Yahoo site gives you an English 1GB account, regardless of the fact that Yahoo does not offer free 1GB accounts (free accounts get 100MB, paid accounts get 2GB; there's no in-between).

Maybe it's all true. But, to me, it all seems somehow unlikely.