have gone through the topic “AZURE Push notifications to users by using Mobile Services” and mentioned below my thoughts on this topic.
But according to discussion if there many users then we can use Windows Azure Notification Hubs. This can be used to send push notification to many mobile services developed of on Windows 8 apps and iOS apps. As of January 2013, Notification Hubs are able to push notifications to Windows 8 apps and iOS apps. Support for Android and Windows Phone will be added soon. Source http://msdn.microsoft.com/en-us/library/windowsazure/jj927170.aspx