We may refuse to grant you a username or password that is already in use, impersonates someone else, is or may be illegal, is or may be protected by trademark or other proprietary rights, is vulgar or otherwise offensive, or may cause confusion, as determined by us in our sole discretion.</p>Requirements<p>This website is for use by adults who are eighteen (18) years of age or older. Users under the age of eighteen (18) may not use the website. By using the website, you also submit that you are eighteen (18) years of age or older. You also agree that you will not use our website or the Services for any purpose that is unlawful, unethical or in violation of these Terms.</p>Charges and billing<p>You must provide a valid credit card number or a web-based payment account when you order an InsideTracker product or service.