installed plugin W3 Total Cache version 2.3.2

wp-content/plugins/w3-total-cache/UsageStatistics_Page_View_Free.php

@@ -0,0 +1,22 @@
+<?php
+namespace W3TC;
+
+if ( ! defined( 'W3TC' ) ) {
+	die();
+}
+
+require W3TC_INC_DIR . '/options/common/header.php';
+?>
+<div class="metabox-holder ustats_ad_metabox">
+	<?php Util_Ui::postbox_header( esc_html__( 'Usage Statistics', 'w3-total-cache' ) ); ?>
+
+	<div class="ustats_ad">
+		<?php require __DIR__ . '/UsageStatistics_Page_View_Ad.php'; ?>
+
+		<input type="button" class="button-primary button-buy-plugin"
+			data-src="page_stats_bottom"
+			value="<?php esc_attr_e( 'upgrade', 'w3-total-cache' ); ?>" />
+	</div>
+
+	<?php Util_Ui::postbox_footer(); ?>
+</div>