One of the things our product does is helps business owners follow a simple, structured sales process. During early development we are BCC’d on the outbound email to keep track of who was messaged.
It gives me endless energy to see those messages go out. 

The BCC “feature” is useful so we don’t have to code any send-tracking stuff yet. And then it helps us troubleshoot for our customers. But the side-effect is we get to watch as our customers do the work.