feat(user-center): merge promotion rewards into revenue

templates/pages/page-sign.php

@@ -122,7 +122,9 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['user_login'], $_POST[
 }
 
 $invite_prefill = '';
-if (!empty($_GET['invite'])) {
+if (!empty($_GET['ref'])) {
+    $invite_prefill = sanitize_key(wp_unslash($_GET['ref']));
+} elseif (!empty($_GET['invite'])) {
     $invite_prefill = sanitize_key(wp_unslash($_GET['invite']));
 } elseif (!empty($_COOKIE['aksrt_invite'])) {
     $invite_prefill = sanitize_key(wp_unslash($_COOKIE['aksrt_invite']));