Stack leaderboards; add explanation

web/pages/leaderboards.tsx

@@ -7,6 +7,7 @@ import { getTopCreators, getTopTraders, User } from '../lib/firebase/users'
 import { formatMoney } from '../../common/util/format'
 import { fromPropz, usePropz } from '../hooks/use-propz'
 import { Manaboard } from '../components/manaboard'
+import { Title } from '../components/title'
 
 export const getStaticProps = fromPropz(getStaticPropz)
 export async function getStaticPropz() {
@@ -60,6 +61,35 @@ function Leaderboards(props: { topTraders: User[]; topCreators: User[] }) {
   )
 }
 
+function Explanation() {
+  return (
+    <div className="prose mt-8 text-gray-600">
+      <h3 id="how-this-works">How this works</h3>
+      <ol>
+        <li>
+          Every slot has an &quot;assessed value&quot;: what the current holder
+          thinks the slot is worth.
+        </li>
+        <li>Slot holders pay a 10% per hour tax to Manafold on the value.</li>
+        <li>
+          At any time, you can buy a leaderboard slot from the current holder
+          for its value.
+        </li>
+        <li>Then, you can reassess it to a new value!</li>
+      </ol>
+      <p>
+        <em>
+          Note: this mechanism is known as a{' '}
+          <a href="https://medium.com/@simondlr/what-is-harberger-tax-where-does-the-blockchain-fit-in-1329046922c6">
+            Harberger Tax
+          </a>
+          !
+        </em>
+      </p>
+    </div>
+  )
+}
+
 export default function Manaboards(props: {
   topTraders: User[]
   topCreators: User[]
@@ -71,8 +101,17 @@ export default function Manaboards(props: {
   const { topTraders, topCreators } = props
 
   return (
-    <Page margin>
+    <Page margin rightSidebar={<Explanation />}>
-      <Col className="items-center gap-10 lg:flex-row">
+      <Title text={'Leaderboards (FOR SALE!)'} />
+      <div className="prose mb-8 text-gray-600">
+        <p>
+          Manafold Markets is running low on mana, so we&#39;re selling our
+          leaderboard slots to make up the deficit. Buy one now for ephemeral
+          glory, and help keep Manafold afloat!
+        </p>
+      </div>
+
+      <Col className="mt-6 items-center gap-10">
         <Manaboard title="🏅 Top traders" users={topTraders} />
         <Manaboard title="🏅 Top creators" users={topCreators} />
       </Col>