diff --git a/handlers/keys/operations/renewal.py b/handlers/keys/operations/renewal.py
index 46a335e9..b5554d44 100644
--- a/handlers/keys/operations/renewal.py
+++ b/handlers/keys/operations/renewal.py
@@ -107,10 +107,10 @@ async def renew_on_3xui(
             continue
         if SUPERNODE:
             unique_email = f"{email}_{server_name.lower()}"
-            sub_id_val = email if update_links else None
+            sub_id_val = email
         else:
             unique_email = email
-            sub_id_val = unique_email if update_links else None
+            sub_id_val = unique_email
         traffic_bytes = total_gb * 1024 * 1024 * 1024 if total_gb else 0
 
         async def process_server(si, inbound, uniq, sub, name):
diff --git a/handlers/payments/currency_rates.py b/handlers/payments/currency_rates.py
index c730c835..043cfc79 100644
--- a/handlers/payments/currency_rates.py
+++ b/handlers/payments/currency_rates.py
@@ -5,7 +5,7 @@ from typing import Optional, Tuple
 import time
 from decimal import ROUND_HALF_UP, Decimal
 import aiohttp
-from config import MULTICURRENCY_ENABLE, FX_MARKUP
+from config import MULTICURRENCY_ENABLE, FX_MARKUP, RUB_TO_USD
 
 
 CBR_URL = "https://www.cbr-xml-daily.ru/daily_json.js"
@@ -33,15 +33,15 @@ async def to_rub(amount: float | Decimal, base: str, *, session: aiohttp.ClientS
 
 
 async def get_rub_rate(quote: str, *, session: aiohttp.ClientSession | None = None) -> Decimal:
-    """
-    Возвращает курс 'QUOTE per RUB' (сколько единиц валюты QUOTE приходится на 1 рубль).
-    Пример: для USD при 100 RUB за 1 USD вернёт 0.01 USD/RUB.
-    Здесь же применяется наценка FX_MARKUP (если задана и валюта не RUB).
-    """
     code = quote.upper()
     if code == "RUB":
         return Decimal("1")
 
+    if code == "USD" and RUB_TO_USD not in (False, None, 0):
+        rate = _q(Decimal("1") / Decimal(str(RUB_TO_USD)))
+        cache[code] = (time.time(), rate)
+        return rate
+
     now = time.time()
     cached = cache.get(code)
     if cached and now - cached[0] < CACHE_TTL: