Do popups help or hurt on Black Friday?

Black Friday is on November 27 this year, and I keep going back and forth on one question: when every visitor arrives already looking for a deal, what do popups and other on-site elements really do?

Here is how I split it:

- Before the sale: collecting emails for early access ("get the deal before it goes public")

- During the sale: a countdown to the end of the offer, an announcement bar, a free-shipping threshold, an upsell at add-to-cart

- Last chance: exit intent, a Cyber Monday extension

My doubt is that a plain "10% off for your email" stops working when the whole store is already discounted, and that the deadline becomes the hook instead of the offer.

So I'm curious about your side:

1. Which element earns its place on Black Friday in your store or product?

2. What do you switch off because shoppers are already in a hurry?

3. Do you rewrite the copy for the sale, or reuse the everyday popup?

Share what worked and what backfired.