I've been getting a lot of the "call me to discuss" emails from potential clients who I know are not actually real clients. In 2017, nobody calls anybody anymore. Busy people with a mission to get a project done email the details up front and have no time to play phone tag. One common thing that happens with commercial designers is they find your art online and negotiate with their clients before actually finding out if you can or will agree to their prices. They bank on an artist being desperate, dumb, and somehow the only person on the internet without access to google or any other artist friends. They think if they can get you to give up your time and TALK to them, they can convince you to do what they want, the way a car salesman does. They make their own deals involving your art then come to you after. Sorry, people, we know your game. We talk to each other. This business maneuver is different than the obvious scam where a guy says his wife was looking at your art and wants to buy $25k worth of art. These types of time wasters are trying to drum up business for themselves and hope they can just pay you ten percent of what you would normally charge since you spent an hour on the phone with them and their client can offer "exposure" you will do it.
Click and Scroll and you will see an actual email exchange between me and one of these people. I blanked out identifying info. I did not respond to her final request to call her. I work with many design agencies who place my art in their commercial spaces. Never once has one asked me to rush to the phone to call them before a deal was in place or contract with me signed. If a designer really wants to use your art or product, the details will be in writing up front.