This is exactly what happened to me with some wood preservative.I don't know how often AMAZON send out messages like those, but the only time I ever received one.....I got another, then another, and another....and another....several of them, I think there was even a time I got two in the same day. I would always click to accept the delay.
Long story short, the only time I ever received those e-mails - AMAZON eventually ended up cancelling my order.
No message from Amazon yet for me, but we will see.