diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bffa87c2..383f072d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,6 +29,7 @@ jobs:
       - run: node --test .github/scripts/fork-yaml-ci.test.cjs
       - run: node --test .github/scripts/program-logo-server.test.cjs
       - run: npx tsx --test scripts/posthog-noise.test.ts
+      - run: npx tsx --test scripts/apply-cta.test.ts
       - run: npx tsc --noEmit
       - run: npm run build
       - run: npm run verify:client-registry
diff --git a/scripts/apply-cta.test.ts b/scripts/apply-cta.test.ts
new file mode 100644
index 00000000..9743f8b1
--- /dev/null
+++ b/scripts/apply-cta.test.ts
@@ -0,0 +1,37 @@
+import assert from "node:assert/strict"
+import { test } from "node:test"
+import { applyEarnLabel, ctaWordCount } from "../src/lib/apply-cta"
+import type { Program } from "../src/lib/programs"
+
+function commission(partial: Partial<Program["commission"]>): Program["commission"] {
+  return {
+    type: "recurring",
+    rate: "20%",
+    mode: "percentage",
+    value: 20,
+    currency: "USD",
+    ...partial,
+  }
+}
+
+test("percentage uses the signed wording and stays within 4 words", () => {
+  const label = applyEarnLabel(commission({ mode: "percentage", value: 20, rate: "20%" }))
+  assert.equal(label, "Apply & earn 20%")
+  assert.ok(ctaWordCount(label) <= 4)
+  assert.equal(label.includes("—") || label.includes("–"), false)
+})
+
+test("flat fee does not grow a percent sign", () => {
+  const label = applyEarnLabel(commission({ mode: "flat", type: "one-time", value: 36, rate: "$36" }))
+  assert.equal(label, "Apply & earn $36")
+  assert.ok(ctaWordCount(label) <= 4)
+})
+
+test("unknown and long rates stay short", () => {
+  assert.equal(applyEarnLabel(commission({ mode: "unknown", value: null, rate: "varies" })), "Apply & earn")
+  const long = applyEarnLabel(
+    commission({ mode: "hybrid", value: null, rate: "$5 per lead + 30%" }),
+  )
+  assert.equal(long, "Apply & earn")
+  assert.ok(ctaWordCount(long) <= 4)
+})
diff --git a/src/app/programs/[slug]/page.tsx b/src/app/programs/[slug]/page.tsx
index 27aeff69..e73ab3ba 100644
--- a/src/app/programs/[slug]/page.tsx
+++ b/src/app/programs/[slug]/page.tsx
@@ -34,6 +34,7 @@ import { RelatedPrograms } from "@/components/related-programs";
 import { SocialListenLoader } from "@/components/social-listen-loader";
 import { serializeJsonLd } from "@/lib/json-ld";
 import { programs, getProgram, parseCommissionRate, commissionLabel, affiliateScore, IN_HOUSE, commissionDisplay, commissionUnknown} from "@/lib/programs";
+import { applyEarnLabel } from "@/lib/apply-cta";
 import { TrackView, TrackLink } from "./track-view";
 
 export const revalidate = 86400;
@@ -132,6 +133,7 @@ export default async function ProgramPage({
   if (!program) notFound();
 
   const joinUrl = program.signupUrl ?? program.url;
+  const applyCta = applyEarnLabel(program.commission);
 
   // Affiliate Score
   const score = affiliateScore(program);
@@ -323,15 +325,14 @@ export default async function ProgramPage({
               <h2 className="text-base font-semibold mb-3">How to Join</h2>
               <div className="rounded-xl border border-border/50 bg-card/30 p-5 space-y-4">
                 {program.signupUrl && (
-                  <a
+                  <TrackLink
                     href={program.signupUrl}
-                    target="_blank"
-                    rel="noopener noreferrer"
+                    slug={slug}
                     className="inline-flex items-center gap-2 rounded-lg bg-foreground text-background px-4 py-2.5 text-sm font-medium hover:bg-foreground/90 transition-colors"
                   >
-                    Apply to program
+                    {applyCta}
                     <ExternalLink className="h-3.5 w-3.5" />
-                  </a>
+                  </TrackLink>
                 )}
                 <div className="flex flex-wrap gap-6">
                   {approvalInfo && (
@@ -617,7 +618,7 @@ export default async function ProgramPage({
             slug={slug}
             className="flex items-center justify-center gap-2 rounded-xl bg-foreground hover:bg-foreground/90 text-background px-5 py-3 text-sm font-medium transition-colors w-full"
           >
-            Join Program
+            {applyCta}
             <ExternalLink className="h-3.5 w-3.5" />
           </TrackLink>
         </div>
diff --git a/src/app/programs/[slug]/track-view.tsx b/src/app/programs/[slug]/track-view.tsx
index 4902cee8..11bbdd3c 100644
--- a/src/app/programs/[slug]/track-view.tsx
+++ b/src/app/programs/[slug]/track-view.tsx
@@ -27,7 +27,10 @@ export function TrackLink({
       target="_blank"
       rel="noopener noreferrer"
       className={className}
-      onClick={() => track("outbound_click", { slug })}
+      onClick={() => {
+        track("outbound_click", { slug })
+        track("cta_oa_program", { slug })
+      }}
     >
       {children}
     </a>
diff --git a/src/lib/apply-cta.ts b/src/lib/apply-cta.ts
new file mode 100644
index 00000000..dcab466a
--- /dev/null
+++ b/src/lib/apply-cta.ts
@@ -0,0 +1,22 @@
+import { commissionDisplay, commissionUnknown, type Program } from "@/lib/programs"
+
+/** Whitespace-separated tokens. "&" counts, so the signed cap stays at 4. */
+export function ctaWordCount(label: string): number {
+  return label.trim().split(/\s+/).filter(Boolean).length
+}
+
+/**
+ * Program-page apply button. Signed form: "Apply & earn {commission}%",
+ * no em dash, at most 4 words. A flat fee keeps its dollar sign and does
+ * not gain a percent. A rate that would run past 4 words falls back to
+ * "Apply & earn" rather than a truncated number.
+ */
+export function applyEarnLabel(commission: Program["commission"]): string {
+  const prefix = "Apply & earn"
+  if (commissionUnknown(commission)) return prefix
+  const shown = commissionDisplay(commission)
+  if (!shown || shown === "Not published") return prefix
+  const label = `${prefix} ${shown}`
+  if (/[—–]/.test(label) || ctaWordCount(label) > 4) return prefix
+  return label
+}