[bayshanac]

I tried echo before preg_match in order_by_most_favorited function and nothing. It seems that the function isn’t loaded. It is called in setup_filters:

private function setup_filters() {
		add_filter( 'bp_ajax_querystring',              array( $this, 'activity_querystring_filter' ), 12, 2 );
        add_filter( 'bp_activity_get_user_join_filter', array( $this, 'order_by_most_favorited' ), 10, 6 );
	}