Can Klaviyo actually tell you which one-time buyers are worth trying to win back?

I'm curious how Shopify + Klaviyo merchants handle this in practice.

Suppose you have a group of customers who purchased once but never placed a second order.

Identifying them is easy.

The harder question is:

Which of those customers were actually likely to buy again — and which ones were probably never going to return anyway?

How do you make that distinction today?

Do you rely on:

- purchase history
- email/SMS engagement
- browsing behavior
- product purchased
- segments or predictive data
- manual analysis

Or is this still mostly judgment?

I'd especially like to hear from merchants or in-house retention/CRM operators who have dealt with this using real store data.

If you'd rather not share details publicly, feel free to message me.