Looks like adding jQuery(document).ready(function($) { }) fixes it. Huge thanks to https://www.dotstudio.co.uk for helping me figure it out and thanks again for the great plugin!
<script>
var refreshId;
jQuery(document).ready(function($) {
refreshId = setInterval(function() {
var $data = $('div[id*="loaded_ajaxize_this:wc_product_sold_count:de15b9d8398e5ba659ac99d2cbc154ec5254d088"]');
$data.each( function() {
$data.fadeOut(2000, function() {
var newquery = $.query.set('ajaxize_this', $data.attr('id')).set('_wpnonce', ajaxizeParams._wpnonce);
$data.load(location.pathname + newquery, function() {
$data.fadeIn(2000);
});
});
});
return false;
}, 10000);
});
</script>