Copy Cloud Storage: 15 gigabytes for free

Yesterday I discovered a new file storage service, Copy, which gives 15 gigabytes for free during registration and plus 5 gigabytes during registration of referrals (5 gig is charged both to the invited and invited).

The service is analog Dropbox and provides a web interface for managing and uploading files.
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Supported platforms: PC, Mac, Linux, Android and iOS.

The action is temporary. For more 5 gigabytes, write in a personal or look just below in the comments.

Update
The average Copy user gets 60 gigabytes from referrals. The top already have about 10 terabytes.