Allows you to append a string to the sharing URL for all social networks so you can track purchases better, Requires EDD Social Discounts v2.0.1 or newer. https://easydigitaldownloads.com/extensions/edd-social-discounts/

gistfile1.php

<?php

function sumobi_edd_social_discounts_share_url( $url ) {
	// append to URL
	$url .= '?source=social_share';

	return $url;
}
add_filter( 'edd_social_discounts_share_url', 'sumobi_edd_social_discounts_share_url' );