> You send an email to a prospect, that person quickly follows up saying they are not interested, but 3 months later, they reopen that same email, you get a live read notification, you instantly take your phone and follow up. You win.

This is awful and precisely the reason I set my mail clients to not open remote content by default since I started using email decades ago.

If this exact situation occurred to me as a prospect, I would likely never deal with that company again.