notfeatured
$meta_query = array( 'relation' => 'AND', array( 'key' => '_is_ns_featured_post', 'value' => 'yes', 'compare' => 'NOT EXISTS', ), );
$meta_query = array( 'relation' => 'AND', array( 'key' => '_is_ns_featured_post', 'value' => 'yes', 'compare' => 'NOT EXISTS', ), );