Hi,
Showing a static discount code directly in the pop-up can lead to higher conversions as it removes steps for customers. However, sending the code via email after sign-up can improve engagement and reduce fake sign-ups.
A balanced approach could be to use both methods depending on your goals: show the coupon immediately if conversion is key, but send a confirmation email with the code to ensure valid subscriptions.
You might also consider A/B testing these approaches to see which performs better for your specific audience
Hello @Kimmy42 !
Thank you for your question and for being part of the Klaviyo Community 
For the best balance between conversions and long-term email marketing benefits, I’d recommend sending the discount code via email (Option 2). This helps maintain an engaged email list and encourages valid sign-ups since people need to provide real email addresses to receive the code.
To enhance this approach:
- Trigger the discount email immediately after sign-up to minimize any delay.
- Include a confirmation message on the last step of the form that says something like, “Check your inbox for your discount code—it’s on its way!”
As @Fario Consulting mentioned, you can A/B test one approach vs the other and see what performs best.
Let us know if you have any more questions!
@AlexandraPalau @Fario Consulting Thank you both for your insights! I really appreciate your time and help—this gives me a clearer direction. 
Show a static discount code on the success page (faster for customers but might lead to fake sign-ups).
Send the discount code via email (single opt-in) (better for engagement but adds a delay).