Why did my email sign-ups suddenly drop?

If traffic stayed the same, the popup likely stopped showing, broke on some devices, or its offer changed. A weaker offer can cut sign-ups even when the form works.

How do I test my sign-up popup?

Sign up yourself with a test email address. Check that the welcome email arrives and that the code applies at checkout. Try it on a phone and a desktop, since a popup can break on one and not the other.

Can other assistants run this prompt?

Yes. Any assistant that can read the same sign-up, session and order data, connected or from an uploaded file, can follow it. That includes ChatGPT, Grok and Muse.

What if we changed the popup on purpose?

Then nothing is broken. The useful output is what the change cost in sign-ups and welcome-code orders, so you can decide whether to keep it.

All playbooks

Stop losing money · Leak

Sign-up popup stopped working

Email sign-ups halving overnight is rarely a traffic problem.

When email sign-ups fall sharply while site traffic holds steady, the popup usually broke or its offer changed. Connect Klaviyo, Google Analytics and Shopify to Claude, ask it to chart daily sign-ups against sessions for 90 days, and check the form, its offer and welcome-code orders. Restore the popup and test it yourself.

1
Connect
2
Ask
Chart email sign-ups per day for the last 90 days next to site sessions per day. Flag any day sign-ups fell by more than 40% while sessions held steady. Then check: is the popup form still live, did its offer change, and are welcome-code orders in Shopify falling at the same time?
Paste this into Claude, ChatGPT, Codex or Cursor.
3
Act
Restore the popup or its offer. Sign up yourself with a test address to check the code arrives and applies at checkout.

What it tends to findExample

The popup switched from 10% off to a giveaway on 3 Oct. Sign-ups fell 55% and welcome-code orders fell with them.

Watch out

If someone changed the popup on purpose, the finding is 'here is what that choice costs', not 'it broke'.

Step by step

01Connect Klaviyo, Google Analytics and Shopify read-only, through a Claude connector or MCP server if available, or upload sign-up, session and order exports.
02Run the prompt to chart daily sign-ups next to sessions and flag sudden drops.
03Ask whether someone changed the popup on purpose; then the finding is the cost of that choice.
04Restore the popup or its offer, then sign up with a test address to confirm the code arrives and works.
05Re-run the check weekly.

Questions

Run these next

Every number on these pages is an illustrative example, not a result from a named store. Read-only access is enough for every check; make any change yourself.

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