gatherer/{css,templates}: basic donation style

gatherer/assets/style.css

@@ -179,6 +179,14 @@ article .images .image {
     transition: left 0.5s ease-in-out 0s;
 }
 
+.plain {
+    max-width: 40rem;
+    margin: 2rem 2rem 4rem;
+}
+.plain fieldset {
+    text-align: center;
+}
+
 footer p {
     text-align: center;
     font-size: 80%;

gatherer/templates/token_donate.html

@@ -15,7 +15,7 @@
     </header>
 
     <main>
-      <div>
+      <div class="plain">
         <form method="post">
           <fieldset>
             <legend>What is your home instance?</legend>
@@ -31,7 +31,18 @@
 
         <h2>Background</h2>
         <p>
-          Mastodon is <a href="https://github.com/mastodon/mastodon/pull/23989#issuecomment-1628961709">breaking unauthenticated access</a> in future versions.
+          Mastodon is <a href="https://github.com/mastodon/mastodon/pull/23989#issuecomment-1628961709">breaking unauthenticated access</a> in future versions. That really sucks for <a href="https://fedi.buzz">#FediBuzz</a> and the <a href="https://relay.fedi.buzz">#FediBuzz Relay</a>.
+        </p>
+
+        <h2>What about my privacy?</h2>
+        <p>
+          We consume only the <em>public</em> timeline. There are neither boosts nor replies inside, and of course no private messages ever.
+        </p>
+        <p>
+          #FediBuzz gets at less data than what the Web crawlers can see. Of course, we respect the Internet standard <em>robots.txt</em>.
+        </p>
+        <p>
+          Despite taking these precautions, we still do not recommend using ActivityPub for private messaging. It is made for publishing, after all. We recommend XMPP with <a href="https://omemo.top/">OMEMO</a>.
         </p>
       </main>
 

gatherer/templates/token_thanks.html

@@ -15,7 +15,7 @@
     </header>
 
     <main>
-      <div>
+      <div class="plain">
         <form method="post">
           <fieldset>
             <legend>Donate a token for another instance?</legend>