public static function display_start_page() {
    if ( isset( $_GET['action'] ) ) {
      if ( $_GET['action'] == 'delete-key' ) {
        if ( isset( $_GET['_wpnonce'] ) && wp_verify_nonce( $_GET['_wpnonce'], self::NONCE ) )
          delete_option( 'wordpress_api_key' );
      }
    }

    if ( $api_key = Akismet::get_api_key() && ( empty( self::$notices['status'] ) || 'existing-key-invalid' != self::$notices['status'] ) ) {
      self::display_configuration_page();
      return;
    }

    //the user can choose to auto connect their API key by clicking a button on the akismet done page
    //if jetpack, get verified api key by using connected wpcom user id
    //if no jetpack, get verified api key by using an akismet token	

    $akismet_user = false;

    if ( isset( $_GET['token'] ) && preg_match('/^(\d+)-[0-9a-f]{20}$/', $_GET['token'] ) )
      $akismet_user = self::verify_wpcom_key( '', '', array( 'token' => $_GET['token'] ) );
    elseif ( $jetpack_user = self::get_jetpack_user() )
      $akismet_user = self::verify_wpcom_key( $jetpack_user['api_key'], $jetpack_user['user_id'] );

    if ( isset( $_GET['action'] ) ) {
      if ( $_GET['action'] == 'save-key' ) {
        if ( is_object( $akismet_user ) ) {
          self::save_key( $akismet_user->api_key );
          self::display_configuration_page();
          return;
        }
      }
    }

    Akismet::view( 'start', compact( 'akismet_user' ) );

    /*
		// To see all variants when testing.
		$akismet_user->status = 'no-sub';
		Akismet::view( 'start', compact( 'akismet_user' ) );
		$akismet_user->status = 'cancelled';
		Akismet::view( 'start', compact( 'akismet_user' ) );
		$akismet_user->status = 'suspended';
		Akismet::view( 'start', compact( 'akismet_user' ) );
		$akismet_user->status = 'other';
		Akismet::view( 'start', compact( 'akismet_user' ) );
		$akismet_user = false;
		*/
  }