diff --git a/ads.js b/ads.js
index a132a92..eab988f 100644
Binary files a/ads.js and b/ads.js differ
diff --git a/db.js b/db.js
index c440a24..c0c3c8f 100644
--- a/db.js
+++ b/db.js
@@ -75,6 +75,7 @@ async function bootstrap() {
   await alterSafe0('ALTER TABLE earned_credits ADD COLUMN purchase_grade INT NOT NULL DEFAULT 0'); // part of the pool that is refunded/credited PURCHASED money: shows as purchased, funds login ads
   await alterSafe0('ALTER TABLE earned_credits ADD COLUMN login_day CHAR(10) NULL');   // last daily-login-bonus day
   await alterSafe0('ALTER TABLE earned_credits ADD COLUMN login_streak INT NOT NULL DEFAULT 0'); // consecutive-day streak
+  await alterSafe0('ALTER TABLE earned_credits ADD COLUMN login_ts BIGINT NOT NULL DEFAULT 0'); // when the last sign-in bonus was paid: enforces a 20h floor, whatever the day string says
   // additive columns (MySQL 8 has no IF NOT EXISTS for columns)
   const alterSafe = async sql => {
     try { await q(sql); }