Sample for creating seats for parent membership level at checkout.

pmprosm-sponsor-level-example.php

<?php
/*
Define the global array below for your main accounts and sponsored levels.
Array keys should be the main account level.
*/

global $pmprosm_sponsored_account_levels;
$pmprosm_sponsored_account_levels = array(
	//set 3 seats for level 8 at level 2 checkout
	2 => array( //id # of parent level
		'main_level_id' => 2, //redundant but useful
		'sponsored_level_id' => 8, //array or single id of sponsored levels
		'seats' => 3
    ),
    //set 3 seats for level 9 at level 4 checkout
    4 => array( //id # of parent level
		'main_level_id' => 4, //redundant but useful
		'sponsored_level_id' => 9, //array or single id of sponsored levels
		'seats' => 3
	)
);