sign premium

add_filter( 'the_title', function ( $title, $post_id ) {
    if ( jeg_metabox( 'jnews_paywall_metabox.enable_premium_post', false, $post_id ) && ( is_home() || is_front_page() || is_archive() ) ) {
        $title .= ' +';
    }
    return $title;
}, 999, 2 );