I've been trying to order from non Amazon sites as a habit lately. A large percentage of them use the same platform, maybe it's Shopify?

During checkout, they have a checkbox asking if you also want to receive promotional emails. It's annoying that this is checked by default, but I can tolerate it to some degree since I still have the ability to opt out.

I always uncheck it. Always.

Almost without fail, I end up receiving marketing emails from these companies. (And not just followups from my purchase or even review requests, which would be bad enough.)

I never buy from those brands again.