Send Email Notice if balance goes below 100 points

/**
 * Add custom email instance
 * @for myCRED Email Notifications
 * @version 1.0
 */
add_filter( 'mycred_email_instances', 'mycred_pro_add_custom_email_instance' );
function mycred_pro_add_custom_email_instance( $instances ) {

	// Custom instance with id "balance" (must be unique)
	$instances['less'] = array(
		'label'    => 'Balance',
		'then'     => 'balance is less then 100',
		'end'      => ''
	);
	return $instances;

}

/**
 * Handle custom email event
 * @for myCRED Email Notifications
 * @version 1.0
 */
add_filter( 'mycred_get_email_events', 'mycred_pro_handle_custom_email_event', 10, 3 );
function mycred_pro_handle_custom_email_event( $events, $request, $mycred ) {

	if ( $request['amount'] < 0 ) {

		extract( $request );

		// The limit - change to any amount you like
		$limit = 100;

		$balance = $mycred->get_users_balance( $user_id, $mycred->cred_id );
		if ( $balance < $limit )
			$events[] = 'less|then';

	}

	return $events;

}