Deduct points when clicking on links from link owners

/**
 * Deduct Points when clicking on links
 * @version 1.0
 */
add_filter( 'mycred_add_finished', 'mycredpro_deduct_points_for_link_click', 10, 3 );
function mycredpro_deduct_points_for_link_click( $result, $request, $mycred ) {

    if ( $result === false || $request['ref'] != 'link_click' ) return $result;

    $data = maybe_unserialize( $request['data'] );

    // Link 1
    if ( $data['link_url'] == 'http://firstlink.com' ) {
        $link_owner = 1;
        $mycred->update_user_balance( $link_owner, -5 );
    }

    // Link 2
    if ( $data['link_url'] == 'http://secondlink.com' ) {
        $link_owner = 2;
        $mycred->update_user_balance( $link_owner, -5 );
    }

    // Link 3
    if ( $data['link_url'] == 'http://thirdlink.com' ) {
        $link_owner = 3;
        $mycred->update_user_balance( $link_owner, -5 );
    }

    return $result;

}