ig-drive is a private, personal tool. It is used by one person only, its owner.
When the owner shares a post they want to keep, ig-drive saves a copy of it in the owner's own Google Drive, in a folder that ig-drive creates.
It asks Google only for the drive.file permission. With it, ig-drive can see and change
only the files and folders it created itself. It cannot see anything else in the Drive.
It is not offered to anyone else, and there is nothing to sign up for.