https://imo.im/privacy 随便看了两眼imo的Privacy Policy...
“What We Collect. We receive and store any information you enter while you access or use the Service (whether on the Site or the Application), or that you give us in any other way. This includes information that can identify you (“Personal Information”). Personal Information may include, but is not limited to: your first and last name, telephone number, postal or email addresses, photos, username, or password, as well as any personal information you choose to include in any of your comments, posts, pictures, or other submissions you make while using the Service.”