original: Editors have so far released two platinum studio albums, selling over 2 million copies between them worldwide.
simplifications: Editors have so far released two platinum studio albums.  They sold over 2 million copies between them worldwide. Editors have released two albums, which sold over 2 million copies worldwide. Editors released two platinum albums.They sold over 2 million copies worldwide. Editors have released two platinum albums. Selling over 2 million units worldwide. Editors have released two platinum studio albums. They have sold over 2 million copies between them worldwide. Editors have so far given two platinum studio albums. They sold over 2 million copies worldwide. Editors have released two best-selling albums. Editors have currently released two platinum studio albums, selling over 2 million copies worldwide. Editors have released two platinum studio albums so far. Between them they have sold over 2 million copies worldwide. Editors have so far released two platinum studio albums, selling over 2 million copies worldwide.