BigCommerce store owners

Coupon extensions are typing your codes into your BigCommerce checkout.

Coupon and cashback extensions pop up on your product pages, cart and checkout, try the codes they've collected in your coupon field and take the affiliate commission. Benson hides their pop-ups by rule, on BigCommerce's Optimized One-Page Checkout too, and guards the coupon field in their sessions.

Free forever up to 25,000 sessions a month. Every Pro feature free for your first 14 days. No card. We'll email you about getting started. Unsubscribe any time.

The headline number

13M

Chrome users run PayPal Honey, one of many extensions that try codes in the discount box.

Chrome Web Store, Oct 2026(opens the source)
The story

Here's what happens on your BigCommerce checkout.

  1. 1

    A shopper reaches checkout.

    A shopper arrives with a coupon extension running and reaches the coupon field. An extension pop-up can interrupt the purchase and prompt them to try a code.

    35%

    of stores with a promo field show it by default. In Baymard's testing, some shoppers left checkout to hunt for a code.

    Baymard Institute, Jun 2024(opens the source)
  2. 2

    An extension tries its codes.

    Honey, Capital One Shopping and others pop up while shoppers browse and buy, then type collected codes into the discount box.

    5M+

    Microsoft Edge users run Capital One Shopping, before you count Chrome.

    Microsoft Edge Add-ons, Oct 2026(opens the source)
  3. 3

    Codes made for someone else get shared.

    Extensions collect codes as shoppers type them. A December 2025 investigation alleged Honey gathered staff, VIP, influencer and newsletter codes this way and published them for everyone.

    PPC Land, Dec 2025(opens the source)
  4. 4

    The discount and commission cost you.

    The order can look normal while a leaked code takes money off the basket and an extension receives affiliate commission.

    Modern Retail, May 2024(opens the source)

What most teams try

  • You could delete the code. Today's leak stops. The people you made it for find it broken, and the replacement can spread the same way.
  • You could make every code single-use. Each shopper needs their own code, and a creator can't share one code with their audience.

Control what happens at checkout.

Benson detects the extension session and applies your pop-up rules on Optimized One-Page Checkout. Checkout code rules let only allowed codes through in extension sessions.

Sound familiar?

Three ways extensions cost a BigCommerce store.

  1. The problem

    Pop-ups interrupt the purchase.

    A coupon or cashback extension can appear over your product pages, cart and checkout, offer codes it has collected and take the affiliate commission for the sale.

    The fix

    Choose where pop-ups stay hidden.

    Set rules by page type, country and device. Benson can hide extension pop-ups on the storefront and Optimized One-Page Checkout when those rules apply.

    See the BigCommerce install
    Sample store

  2. The problem

    Codes reach the coupon field.

    An extension session can bring code attempts to the coupon field during checkout. Store owners need a way to decide which codes are allowed through.

    The fix

    Apply checkout code rules.

    Benson guards the coupon field in extension sessions so only allowed codes go through. Find server-side check samples in the dashboard under Checkout rules → Install.

    Sample store

  3. The problem

    The result is hard to judge.

    Seeing an extension visit does not tell you what happens to revenue when its pop-ups are hidden. You need a comparison across shopper sessions.

    The fix

    Measure against a holdout.

    Benson compares revenue per session with and without protection, giving you a way to assess the effect of your rules on your own store.

    Sample store

Observe mode shows extension activity and what rules would hide without changing anything. Pop-up hiding, checkout code rules and holdouts require Pro. Illustrations use sample data.

See which extensions reach your checkout before you change a thing.

  • Script Manager install
  • Free to watch
  • A holdout behind your rules

Free forever up to 25,000 sessions a month. Every Pro feature free for your first 14 days. No card.

Start free

Whatever you find, there's a next step.

Live on BigCommerce in three steps.

Watching is free, forever; blocking, reports and tests are on Pro.
See pricingBigCommerce install guide

  1. Add the script.

    In Storefront → Script Manager, create a script for the Head on All pages, choose Analytics, paste the snippet and save.

  2. Observe extension visits.

    Use free observe mode to see which extensions visit and what your rules would hide. Observe mode does not change the shopping experience.

  3. Set rules and measure.

    On Pro, choose your pop-up and checkout code rules, then use a holdout to compare revenue per session with and without protection.

On film

Each fix, on film.

Questions

Benson installs through Script Manager and runs on your storefront and BigCommerce's Optimized One-Page Checkout.

Sources

Industry research, checked on 23 October 2026. None of it is Benson data.

  1. 1Chrome Web Store, “PayPal Honey: Automated Coupons & Rewards (listing and user count)”, Oct 2026. chromewebstore.google.com (opens the source)
  2. 2Affiverse (PMA study), “US sales through affiliate hit $113B as investment jumps 49%”, Jun 2025. affiversemedia.com (opens the source)
  3. 3Savings.com, “America's savings shift: 2025 coupon and deal trends”, Dec 2025. savings.com (opens the source)
  4. 4Performance Marketing Association, “Announcing the 2026 Performance Marketing U.S. Brand Survey results”, Jul 2026. thepma.org (opens the source)
  5. 5Baymard Institute, “Checkout optimization: minimize form fields”, Jun 2024. baymard.com (opens the source)
  6. 6Microsoft Edge Add-ons, “Capital One Shopping: Save Now (listing and user count)”, Oct 2026. microsoftedge.microsoft.com (opens the source)
  7. 7PPC Land, “Honey targeted minors in advertising while leaking business codes”, Dec 2025. ppc.land (opens the source)
  8. 8Modern Retail, “How promo code leaks are impacting DTC brands' profit margins”, May 2024. modernretail.co (opens the source)

See what extensions do on your store.

Free forever up to 25,000 sessions a month. Every Pro feature free for your first 14 days. No card. We'll email you about getting started. Unsubscribe any time.