@stam_marko it’s understandable why you’d want to make it easy for people to update their email preferences, especially after they’ve already given you feedback on their recent purchase. I’m also a big fan of making steps as close to one-click for people as possible. 

That said, this is what I would do: use the strategy I recommended above. So people would click the link that updates a custom property on their profile w/ info about their order satisfaction, and get redirected to a page that thanks them for giving you that feedback. 

THEN, as part of a follow-up flow email, you could set up a conditional split that groups people into 2 branches. One is for those who gave positive feedback, and one is for those who gave negative feedback.

Those who gave positive feedback are most likely going to be more engaged with your emails in future, so you could then send them an email that says something like “we’re so glad you were pleased with your order, and we want to respect your inbox so let us know what your email preferences are” - that enables you to give them the dynamic link to the “manage preferences” page you already setup.

As for those who give negative product feedback, you could consider a few options:

• 1, make sure your customer service team follows up with them to see what can be done to improve their experience.
• 2, send them a follow-up email that acknowledges their dissatisfaction and makes the same point of “we want to respect your inbox” then prompts them to unsubscribe or update their preferences.
• 3, maybe you do both of those things!

That will help you proactively clean out disappointed/ frustrated people who would already be turning into low-engagement subscribers, and it gives you a chance to win back some of their trust by showing them you’re not going to send emails they’re not wanting to receive.

I hope this helps!

~ Gabrielle