I tried every top email marketing tool

Adding our recent experience with Klaviyo. Klaviyo charges by "profile". When paired with Shopify, it automatically imports / pulls customer information 5o it's servers even when the customer specifically opted out of marketing.

First month, we were debited 3500EU for opted-out profiles that they had auto-pulled, against the consent of customers and us.

Even with the CEO looped in on emails, we had to threaten chargebacks before they refunded.

They also refused to remove data under our official GDPR request.

That explains why that box hasn't worked when I've used Shopify stores before. I couldn't be bothered to take them to task individually, but I figured they were using some kind of crappy "legitimate interest" basis.

I don’t remember how, but you can lock in a lower tier plan and they will stop sending emails for the month once you hit that thresold. I have a small store that uses the free tier like this for automatic emails and when we need to send promotional emails we just use Shopify native email app which is 100x cheaper than klaviyo