Prior to this, one could easily download Xcode Beta from Apple Developer portal with only their Apple ID. There was no need for Apple Developer membership. (I downloaded Xcode 7 Beta 1 without any problems.) But now that Xcode 7 Beta 3 is released, after I click the download button and sign in using my Apple ID, this page.
I'm not aware of any announcements regarding this issue. Is there some kind of bug involved or Apple limited the access to Xcode Beta for registered developers?