Just received an email from Microsoft with the above content. First thing is that the OneDrive blog is showing Error
Now it is working fine, (just refresh if you are getting the error)
I just logged in to the OneDrive, The signup option says you will get 7GB for free, but old users of SkyDrive who had more than that like me, will have more storage space
You can complete initial steps to get more space, and also will be able to get 5GB space free by referrals. To find referral section you can open the link “Get more storage” (shown in the above picture).
watch the video below from Microsoft.