Locksmith

Thank you so much for sharing your feedback, and I'm very sorry for the issues you faced when using Locksmith. We understand the frustration that comes about when unexpected things happen.

To start, I'd like to address the Shop App issue, for you and for anyone else who reads this:

Please note that if the Shop App is an important part of the traffic and sales on your store, you may not want to install Locksmith, or any other access control app, because the Shop App will stop functioning.

The Shop App have some requirements for using their app. One of those requirements is that the store may not use any access control apps. This includes Locksmith, and any other apps that conditionally restrict access or "gate" the store. You can read the requirements for the Shop App, currently at this url:
https://help.shopify.com/en/manual/online-sales-channels/shop/eligibility/requirements

This is something which is out of our hands, since it's not a requirement we set. Because we know this is important, we make this a major heading in our Agreement page. This agreement must be accepted when the app is installed and before it can be used. You can find the text of that here:
https://www.locksmith.guide/policies/usage-agreement

Using a Locksmith secret link with mailing lists services like Klaviyo can sometimes result in access being denied, and it's usually a minor formatting issue. It looks like we were able to offer you a fix, but at that point you had noticed that the Shop App was inactive, and needed to remove the app.

Locksmith secret links are often used in mailing lists, but they may need to be double checked for formatting. Mailing list emails can sometimes alter the link in a way that results in access being denied, and double checking that the URL parameters are formatted correctly will get things working. We're happy to troubleshoot those if your tests don't work. :)

Again, I'm sorry for the frustration you experienced. We're here to help if you need us.

All the best,

-Ken