As stated in our terms of service (http://www.smilebox.com/terms-of-use.html); You may only use the Services for your private, non-commercial use. You may not use the Services in any way to provide, or as part of, any commercial service or application.
You are not allowed to resell our designs or service for profit. You are allowed to use Smilebox to market or promote your OWN products/services. Please check our terms and service for more information.