diff --git a/src/app/registry/[slug]/profile-client.tsx b/src/app/registry/[slug]/profile-client.tsx
index b3774f2..f77dc7c 100644
--- a/src/app/registry/[slug]/profile-client.tsx
+++ b/src/app/registry/[slug]/profile-client.tsx
@@ -2538,6 +2538,22 @@ export function ProfileClient({ agent, slug, economics, inferenceActivity, class
           {tab === "inference" && (
             <>
               {inferenceActivity && <InferenceActivityBlock ia={inferenceActivity} />}
+              {inferenceActivity && (
+                <a
+                  href={`/surplus/${slug}`}
+                  style={{
+                    display: "flex", alignItems: "center", justifyContent: "space-between",
+                    padding: "10px 14px", marginBottom: 12,
+                    background: "rgba(74,232,160,0.05)", border: "1px solid rgba(74,232,160,0.22)",
+                    borderRadius: "var(--radius-md)", textDecoration: "none",
+                  }}
+                >
+                  <span style={{ fontSize: "0.78rem", fontWeight: 600, color: "var(--ink)" }}>
+                    Surplus × Zetta · Full inference economics report
+                  </span>
+                  <span style={{ fontSize: "0.72rem", color: "var(--accent)", fontWeight: 700 }}>View →</span>
+                </a>
+              )}
               <InferenceTab ia={inferenceActivity} slug={slug} books={books} />
             </>
           )}
diff --git a/src/app/surplus/page.tsx b/src/app/surplus/page.tsx
index 2173a4d..fdfa011 100644
--- a/src/app/surplus/page.tsx
+++ b/src/app/surplus/page.tsx
@@ -227,8 +227,8 @@ export default function SurplusPilotPage() {
         </div>
         <p style={{ fontSize: "0.72rem", color: "var(--muted)", marginTop: 12 }}>
           Questions?{" "}
-          <a href="https://x.com/zettatracker" target="_blank" rel="noreferrer" style={{ color: "var(--accent)", textDecoration: "none" }}>
-            @zettatracker
+          <a href="https://x.com/zettaaidotco" target="_blank" rel="noreferrer" style={{ color: "var(--accent)", textDecoration: "none" }}>
+            @zettaaidotco
           </a>{" "}
           on X.
         </p>
diff --git a/src/components/site-nav.tsx b/src/components/site-nav.tsx
index f923a66..b6b0e14 100644
--- a/src/components/site-nav.tsx
+++ b/src/components/site-nav.tsx
@@ -87,9 +87,10 @@ export function SiteNav() {
           { title: "Luca",        desc: "AI financial analyst. Reads books, cites sources, never invents data.", href: "/luca" },
         ]} />
         <NavDropdown label="Solutions" items={[
-          { title: "For Agent Teams", desc: "Submit a manifest, get attributed books, share your financial profile.", href: "/registry#verify" },
-          { title: "For Developers",  desc: "API access to agent books, registry, revenue, and badge endpoints.", href: "/api" },
-          { title: "For Researchers", desc: "Analyst-grade reports on agent finance and ecosystem attribution.", href: "/research" },
+          { title: "For Agent Teams",    desc: "Submit a manifest, get attributed books, share your financial profile.", href: "/registry#verify" },
+          { title: "Surplus × Zetta",    desc: "Financial visibility for agents routing inference through Surplus.", href: "/surplus" },
+          { title: "For Developers",     desc: "API access to agent books, registry, revenue, and badge endpoints.", href: "/api" },
+          { title: "For Researchers",    desc: "Analyst-grade reports on agent finance and ecosystem attribution.", href: "/research" },
         ]} />
         <NavDropdown label="About Us" items={[
           { title: "What is Zetta", desc: "Financial intelligence infrastructure for autonomous agents.", href: "/about" },