I've run into this before and basically what it comes down to is that these are people coming in with a sales mindset and don't understand (or choose not to und

I've run into this before and basically what it comes down to is that these are people coming in with a sales mindset and don't understand (or choose not to understand) that time = money for some people and they're not going to spend their time listening to someone's pitch unless they have some indicator it's not a waste of their time. They seem to think, "If I can only get him on the phone..." but totally fail to communicate why someone should get on the phone with them. Recruiters do this a lot too. "Let's talk about this opportunity I have with a client." Not when I don't know who you are, who the client is, and whether the job has any of the attributes I'm looking for. You may have indeed missed out on some business opportunities but maybe those weren't the ones you wanted anyway. If someone can't articulate why you should be interested in a simple email, a lot of the time it means they don't have much of value to offer you.