gistfile1.php

<?php
/*
Plugin Name: Easy Digital Downloads - Variable Pricing License Activation Limits
Plugin URL: http://easydigitaldownloads.com/extension/
Description: Limit the number of license activations permitted based on variable prices
Version: 1.0.3
Author: Pippin Williamson
Author URI: http://pippinsplugins.com
Contributors: mordauk
*/

if ( defined( 'WP_LOCAL_DEV' ) && WP_LOCAL_DEV ) {
	function extendd_edd_license_array_debug() {
		if ( isset( $_GET['edd-license'] ) && 'true' === $_GET['edd-license'] ) {
			
			$license_id		= 7936;
			$download_id	= 7819;
			
			$purchase_id 	= get_post_meta( $license_id, '_edd_sl_payment_id', true );
			$purchase_details = edd_get_payment_meta_cart_details( $purchase_id );
			echo '<pre>' . print_r( $purchase_details, true ) . '</pre>';
			
			exit;
			
		}
	}
	add_action( 'init', 'extendd_edd_license_array_debug' );
}

function extendd_edd_sl_license_at_limit( $return = false, $license_id = 0, $limit = 0, $download_id = 0 ) {

	$purchase_id   = get_post_meta( $license_id, '_edd_sl_payment_id', true );
//	$purchase_date = new DateTime( get_post_field( 'post_date', $purchase_id ) );
//	$limit_date    = new DateTime( '2012-01-01' );

//	if ( $purchase_date < $limit_date ) {
		// licenses purchased before January 1, 2013 are unlimited
//		return false;
//	}

	$purchase_details = edd_get_payment_meta_cart_details( $purchase_id );

	$price_id = false;
	
	if ( !$purchase_details )
		return $return;
	
	if ( defined( 'WP_LOCAL_DEV' ) && WP_LOCAL_DEV )
		wp_mail( 'afrostyy@gmail.com', '[EDD] licence limit debug', 'Full purchase details: <pre>' . print_r( $purchase_details, true ) . '<pre>' );
		
	$item = array();
	foreach( $purchase_details as $item ) {
		
		if ( $item['id'] == $download_id ) {
			if ( ! empty( $item['item_number']['options'] ) && ! empty( $item['item_number']['options']['price_id'] ) ) {
				$price_id = (int) $item['item_number']['options']['price_id'];
			}
		}
	}

	if ( $price_id !== false ) {

		switch( $price_id ) {

			case 0:
				$limit = 1; // single site license
				break;
			case 1:
				$limit = 5; // up to 5 sites
				break;
			case 2:
				$limit = 0; // unlimited
				break;
		}

		$site_count = absint( get_post_meta( $license_id, '_edd_sl_site_count', true ) );

		// check to make sure a limit is in place
		if ( $limit > 0 ) {
			if ( $site_count >= absint( $limit ) ) {
				$return = true; // license is at limit
			}
		}
	}

	return $return;

}
add_filter( 'edd_sl_license_at_limit', 'extendd_edd_sl_license_at_limit', 10, 4 );