You're absolutely right. Setting up email filters or even realizing why someone would need E2V is not easy to grasp for most typical end-users. I love coding and designing but sales & marketing is something I haven't spent much time on. ZetaBee isn't a startup for me at this point (http://ktype.net is my full-time project) so I haven't even thought of how I'd monetize/market ZetaBee. Only reason I even added a PayPal purchase option to E2V is so I don't go broke when someone gets 10000 emails sent to their phone.