I am curious if OP has made much money already from these courses. I mean all about the sale if he has acquired some customers in here. I think your strategy isn't good as well. You're wanting an inquiry to email you after asking some questions. It's better if you've explained the details or at least given more details in your original post. Or, if someone really is interested, you should be the one asking them for their email for more information and you're the one to email them, not you. Just saying.