On the point that is will not scale quickly. I wrote a bot that searches through various directories and pulls off email addresses, so its an automated process that does my work and emailing. I don't trust my bot yet so I still check over everything it does. The only reason I mention calling is if they want something done really fast and they are willing to pay for it. I understand completely that using a human to call is not scaleable. Its still a way to gauge my market and get customer feedback.