campaigns: disable daily discount by default — test normal-price deals

The daily 40%-off coupon was being merged into every trucking/UCR/IFTA/OTC
send, but those discount sends were not actually being delivered (the
DKIM-broken window). Now that deliverability is fixed, re-test whether
normal-price offers convert before giving margin away.

New CAMPAIGN_ENABLE_COUPON env flag (default OFF) gates daily-coupon
minting in build_trucking_campaigns + the UCR/IFTA/OTC builders (which
import it as tc.COUPON_ENABLED). With it off, no code is minted and an
empty coupon_code is merged -> the campaign templates' existing
{{ if .Subscriber.Attribs.coupon_code }} guard falls through to the
normal-price {{ else }} branch and landing-page links carry no ?code=.
No template or DB changes; fully reversible (set CAMPAIGN_ENABLE_COUPON=1).

Verified: COUPON_ENABLED defaults False, coupon_attribs(None) -> empty,
lp_link drops ?code= when no coupon, all 4 builders compile.

scripts/build_ifta_quarterly_campaign.py

@@ -224,11 +224,13 @@ def main() -> int:
         _reset_cycle_if_new(conn, q, due)
 
     coupon = None
-    if args.start_campaign and not args.preview and not args.dry_run:
+    if tc.COUPON_ENABLED and args.start_campaign and not args.preview and not args.dry_run:
         try:
             coupon = tc.get_or_create_daily_coupon(conn, today)
         except Exception as exc:  # noqa: BLE001
             LOG.warning("[ifta] coupon mint failed: %s (sending without)", exc)
+    elif not tc.COUPON_ENABLED:
+        LOG.info("[ifta] coupon disabled (CAMPAIGN_ENABLE_COUPON unset) — normal price")
 
     cur = conn.cursor()
     cur.execute(SELECT_SQL, [list(tc.BLOCKED_EMAIL_DOMAINS), touch_no, args.limit])

scripts/build_otc_campaign.py

@@ -82,11 +82,13 @@ def main() -> int:
 
     conn = psycopg2.connect(tc.DB_URL)
     coupon = None
-    if args.start_campaign and not args.preview and not args.dry_run:
+    if tc.COUPON_ENABLED and args.start_campaign and not args.preview and not args.dry_run:
         try:
             coupon = tc.get_or_create_daily_coupon(conn, date.today())
         except Exception as exc:  # noqa: BLE001
             LOG.warning("[otc] coupon mint failed: %s", exc)
+    elif not tc.COUPON_ENABLED:
+        LOG.info("[otc] coupon disabled (CAMPAIGN_ENABLE_COUPON unset) — normal price")
 
     def attribs(r):
         si = (r.get("state_inc") or "").strip()

scripts/build_trucking_campaigns.py

@@ -155,6 +155,16 @@ def lp_slug_for(campaign_type: str, phy_state: str | None = None) -> str:
 # checkout enforce expiry + the service-fee-only scope (pass-through government
 # fees are never discounted). The code + prices are merged into the email so the
 # recipient sees a real, expiring deal.
+#
+# DISCOUNT TOGGLE: the daily coupon is DISABLED by default (Jun 2026). The
+# discount sends were not being delivered (DKIM-broken window), so we are
+# re-testing whether normal-price offers convert now that deliverability is
+# fixed. With the coupon off, no code is minted and an empty coupon_code is
+# merged -- the campaign templates' `{{ if .Subscriber.Attribs.coupon_code }}`
+# guard automatically falls through to the normal-price `{{ else }}` branch and
+# the landing-page links carry no `?code=`. Set CAMPAIGN_ENABLE_COUPON=1 to
+# bring the daily deal back. Reversible, no template or DB changes needed.
+COUPON_ENABLED = os.getenv("CAMPAIGN_ENABLE_COUPON", "0") in ("1", "true", "yes")
 COUPON_PCT = int(os.getenv("CAMPAIGN_COUPON_PCT", "40"))
 # Eligible slugs = every discountable service a trucking campaign can link to.
 # Pass-through-only slugs (boc3-filing $25 passthrough, etc.) are intentionally
@@ -903,13 +913,17 @@ def run(send_date: date, dry_run: bool = False, preview: bool = False,
     conn = psycopg2.connect(DB_URL)
 
     # Mint (or reuse) the same-day coupon for this send date so every campaign
-    # in the run shares one expiring code. Preview/dry runs skip the write.
+    # in the run shares one expiring code. Preview/dry runs skip the write, and
+    # the daily deal is disabled by default (see COUPON_ENABLED) -- when off we
+    # send at normal price (empty coupon_code -> template's no-deal branch).
     daily_coupon = None
-    if not dry_run and not preview:
+    if COUPON_ENABLED and not dry_run and not preview:
         try:
             daily_coupon = get_or_create_daily_coupon(conn, send_date)
         except Exception as exc:  # noqa: BLE001
             LOG.warning("[coupon] could not mint daily coupon: %s (sending without)", exc)
+    elif not COUPON_ENABLED:
+        LOG.info("[coupon] disabled (CAMPAIGN_ENABLE_COUPON unset) — sending at normal price")
 
     base_mcs150 = get_base_campaign(CAMPAIGN_MCS150_ID)
     base_inactive = get_base_campaign(CAMPAIGN_INACTIVE_ID)

scripts/build_ucr_annual_campaign.py

@@ -170,11 +170,13 @@ def main() -> int:
         _reset_cycle_if_new(conn, year)
 
     coupon = None
-    if args.start_campaign and not args.preview and not args.dry_run:
+    if tc.COUPON_ENABLED and args.start_campaign and not args.preview and not args.dry_run:
         try:
             coupon = tc.get_or_create_daily_coupon(conn, today)
         except Exception as exc:  # noqa: BLE001
             LOG.warning("[ucr] coupon mint failed: %s", exc)
+    elif not tc.COUPON_ENABLED:
+        LOG.info("[ucr] coupon disabled (CAMPAIGN_ENABLE_COUPON unset) — normal price")
 
     cur = conn.cursor()
     cur.execute(SELECT_SQL, [list(tc.BLOCKED_EMAIL_DOMAINS), touch_no, args.limit])