New Update of RS Settings was prevented from View page source.
So, we can't search "Account number", email ... if that account was Activated.
We could not found "Account number" or @ in that Settings page.
But, we have a lot ways to see it ...
Way1: Use "RS.Acc checker" from RapidLeech. This Script will detect the true email base alias.
Way2: Paste that account to JDownloader. This App will detect the true account number base alias.