Promote my new monthly newsletter in sidebar

Design help from o3 https://chatgpt.com/share/6836521b-dd30-8006-b7a9-cb92a9416ca0

I uploaded it this image: https://static.simonwillison.net/static/2025/promo-goes-here.png

Author: simonw

templates/_sponsor_promo.html

@@ -0,0 +1,42 @@
+<section style="
+    /* .promo */
+    border-radius: 8px;
+    margin: 1.5rem 0;
+    padding: 1rem 1.25rem;
+    /* .variant-a */
+    border: 2px solid #6c3eb9;
+  ">
+  <h3 style="
+      /* h3 */
+      margin: 0 0 0.5rem;
+      font-size: 1.25rem;
+    ">
+    Monthly briefing
+  </h3>
+  <p style="
+      /* p */
+      margin: 0 0 1rem;
+      line-height: 1.4;
+    ">
+    Sponsor me for <strong>$10/month</strong> and get a curated email digest of the month's most important LLM developments.
+  </p>
+  <p style="
+      /* p */
+      margin: 0 0 1rem;
+      line-height: 1.4;
+    ">
+    Pay me to send you less!
+  </p>
+  <a href="https://github.com/sponsors/simonw/" style="
+      /* a.button */
+      display: inline-block;
+      padding: 0.5rem 1rem;
+      background: #6c3eb9;
+      color: #fff;
+      text-decoration: none;
+      border-radius: 4px;
+      font-weight: 600;
+    ">
+    Sponsor &amp; subscribe
+  </a>
+</section>

templates/blogmark.html

@@ -24,6 +24,7 @@
 {% include "_tags.html" with obj=blogmark %}
 
 <div data-ea-publisher="simonwillisonnet" data-ea-type="text"></div>
+{% include "_sponsor_promo.html" %}
 
 </div> <!-- .metabox -->
 {% endblock %}

templates/entry.html

@@ -57,6 +57,7 @@ <h2>{{ entry.title|typography }}</h2>
 <p><strong>Previous:</strong> <a href="{{ previous_entry.get_absolute_url }}">{{ previous_entry.title }}</a></p>
 {% endif %}{% endwith %}
 <div data-ea-publisher="simonwillisonnet" data-ea-type="image"></div>
+{% include "_sponsor_promo.html" %}
 </div>
 
 {% if entry.tweet_html %}{{ entry.tweet_html|safe }}{% endif %}

templates/note.html

@@ -1,6 +1,11 @@
 {% extends "item_base.html" %}
 
-{% block title %}{% if note.title %}{{ note.title }}{% else %}Note on {{ note.created|date:"jS F Y" }}{% endif %}{% endblock %}
+{% block title %}padding-top{% endblock %}
+
+{% block extrahead %}
+{{ block.super }}
+<script async src="https://media.ethicalads.io/media/client/ethicalads.min.js"></script>
+{% endblock %}
 
 {% block card_title %}{% if note.title %}{{ note.title }}{% else %}Note on {{ note.created|date:"jS F Y" }}{% endif %}{% endblock %}
 {% block card_description %}{{ note.body|truncatewords:30 }}{% endblock %}
@@ -18,5 +23,9 @@
 {% block secondary %}
 <div class="metabox">
 {% include "_tags.html" with obj=note %}
+
+<div data-ea-publisher="simonwillisonnet" data-ea-type="text"></div>
+{% include "_sponsor_promo.html" %}
+
 </div> <!-- .metabox -->
 {% endblock %}