What was the point of your comment. You are saying exactly what I said.
I said "Play Store alternative" Not "unauthorised Google Play Store client".
There are plenty of alternate app stores for Android from vendors other than Google which carry all the proprietary apps.
There's the Amazon Appstore http://www.amazon.com/appstore
Yandex has a popular store in Russia. https://store.yandex.com/
And since Google doesn't operate in China, there are many popular third party app stores there from companies like Baidu/Tencent/XIaomi/Huawei etc.
And plenty of others around the world.