Use a more descriptive subtitle.

lib/components/UploadPage.js

@@ -53,7 +53,8 @@ export default class UploadPage extends React.Component {
             <Spinner dir="up" />
 
             <h1 className="with-subtitle">FilePizza</h1>
-            <p className="subtitle">Your files, delivered.</p>
+            <p className="subtitle">Free peer-to-peer file transfers in your browser.</p>
+            <p className="subtitle">We never store anything.</p>
             <p>
               <label className="select-file-label">
                 <input type="file" onChange={this.handleSelectedFile} required/>