diff --git a/app/composables/useAdvertisements.ts b/app/composables/useAdvertisements.ts
index 849795bc..3af9f60e 100644
--- a/app/composables/useAdvertisements.ts
+++ b/app/composables/useAdvertisements.ts
@@ -71,7 +71,7 @@ export const popunderProviders = [
     key: 'profiton',
     label: 'Profiton',
     id: 'https://pb.burnetsasgmt.com/rjrr1lrmhPVU/140809',
-    weight: 0.25
+    weight: 0.15
   },
   /**
    * AdsTerra
@@ -83,8 +83,24 @@ export const popunderProviders = [
     label: 'AdsTerra',
     id: 'https://laughedentrust.com/gOEgecu/kAi41dXqVy9f-/APTn2mopi0EK/ZYuxzOlInL9/23jslU_6yYUKuVVn_v9j/va82rI/dw-xJW2djcqgC5mfF7/4gbSUwOzf/rEAE3_4f5WEdqc3rM/VfHINUDVV3EC',
     weight: 0.15
+  },
+  /**
+   * Kadam
+   */
+  {
+    key: 'kadam',
+    label: 'Kadam',
+    id: 'https://hdbtop.com/code/hneuyk427249',
+    noCrossorigin: true,
+    weight: 0.1
   }
-] as const satisfies readonly { key: string; label: string; id: string; weight: number }[]
+] as const satisfies readonly {
+  key: string
+  label: string
+  id: string
+  noCrossorigin?: true
+  weight: number
+}[]
 
 export type PopunderProvider = (typeof popunderProviders)[number]
 export type PopunderProviderKey = PopunderProvider['key']
@@ -208,6 +224,10 @@ export function selectRandomPopunderProviderScript() {
   return randomWeightedChoice(popunderProviderChoices)
 }
 
+export function getPopunderProviderCrossorigin(provider: PopunderProvider) {
+  return 'noCrossorigin' in provider ? undefined : ('anonymous' as const)
+}
+
 export function selectRandomPushAdProviderScript() {
   return randomWeightedChoice(pushAdProviderChoices)
 }
@@ -226,6 +246,8 @@ export default function () {
     pushScript.value = selectRandomPushAdProviderScript()
   }
 
+  const popunderProvider = popunderProviders.find(({ id }) => id === popunderScript.value)
+
   // Load selected ads
   useHead({
     script: [
@@ -235,7 +257,7 @@ export default function () {
         defer: true,
 
         // Fix for CORS issues - https://unhead.unjs.io/usage/composables/use-script#referrerpolicy-and-crossorigin
-        crossorigin: 'anonymous'
+        crossorigin: popunderProvider ? getPopunderProviderCrossorigin(popunderProvider) : 'anonymous'
       },
       {
         src: pushScript.value,
diff --git a/app/pages/__ad-debug/popunder.vue b/app/pages/__ad-debug/popunder.vue
index 424ecc82..57917a5e 100644
--- a/app/pages/__ad-debug/popunder.vue
+++ b/app/pages/__ad-debug/popunder.vue
@@ -1,6 +1,7 @@
 <script setup lang="ts">
   import {
     getPopunderProviderByKey,
+    getPopunderProviderCrossorigin,
     parsePopunderProviderMode,
     popunderProviderModes,
     popunderProviders,
@@ -51,6 +52,9 @@
   const selectedScriptUrl = computed(() =>
     providerMode.value === 'random' ? selectedRandomScript.value : selectedProvider.value.id
   )
+  const armedProvider = computed(() =>
+    armed.value ? popunderProviders.find(({ id }) => id === armedScriptUrl.value) : undefined
+  )
   const reportProviderMode = computed(() => (armed.value ? armedProviderMode.value : providerMode.value))
   const reportProviderLabel = computed(() => (armed.value ? armedProviderLabel.value : selectedProviderLabel.value))
   const reportScriptUrl = computed(() => (armed.value ? armedScriptUrl.value : selectedScriptUrl.value))
@@ -73,6 +77,26 @@
     })
   })
 
+  useHead(() => ({
+    script: armedProvider.value
+      ? [
+          {
+            src: armedProvider.value.id,
+            defer: true,
+            crossorigin: getPopunderProviderCrossorigin(armedProvider.value),
+            onload: () => {
+              status.value = 'script-loaded'
+              addEvent('script-loaded', { url: armedProvider.value?.id })
+            },
+            onerror: () => {
+              status.value = 'script-error'
+              addEvent('script-error', { url: armedProvider.value?.id })
+            }
+          }
+        ]
+      : []
+  }))
+
   onMounted(() => {
     clientMounted.value = true
   })
@@ -176,22 +200,6 @@
 
   onUnmounted(uninstallInstrumentation)
 
-  function injectAdScript(scriptUrl: string) {
-    const script = document.createElement('script')
-    script.src = scriptUrl
-    script.defer = true
-    script.crossOrigin = 'anonymous'
-    script.onload = () => {
-      status.value = 'script-loaded'
-      addEvent('script-loaded', { url: scriptUrl })
-    }
-    script.onerror = () => {
-      status.value = 'script-error'
-      addEvent('script-error', { url: scriptUrl })
-    }
-    document.head.append(script)
-  }
-
   function armAds() {
     if (armed.value) {
       return
@@ -206,7 +214,6 @@
     startedAtMs.value = performance.now()
     installInstrumentation()
     addEvent('armed', { label: armedProviderLabel.value, url: armedScriptUrl.value })
-    injectAdScript(armedScriptUrl.value)
   }
 
   function recordTestClick(label: string) {
diff --git a/test/assets/popunder-provider-weights.test.ts b/test/assets/popunder-provider-weights.test.ts
index a2efa095..872d2a5b 100644
--- a/test/assets/popunder-provider-weights.test.ts
+++ b/test/assets/popunder-provider-weights.test.ts
@@ -6,6 +6,14 @@ describe('popunder provider weights', () => {
     const total = popunderProviders.reduce((sum, provider) => sum + provider.weight, 0)
     expect(total).toBeCloseTo(1, 5)
   })
+
+  it('includes the Kadam trial', () => {
+    expect(popunderProviders.find(({ key }) => key === 'kadam')).toMatchObject({
+      noCrossorigin: true,
+      weight: 0.1
+    })
+    expect(popunderProviders.find(({ key }) => key === 'profiton')).toMatchObject({ weight: 0.15 })
+  })
 })
 
 describe('push ad provider weights', () => {
diff --git a/test/pages/popunder-debug.test.ts b/test/pages/popunder-debug.test.ts
index 5c3e6286..83d77b1b 100644
--- a/test/pages/popunder-debug.test.ts
+++ b/test/pages/popunder-debug.test.ts
@@ -1,9 +1,15 @@
 import { readFileSync } from 'node:fs'
+import { setup, url } from '@nuxt/test-utils'
 import { describe, expect, it } from 'vitest'
+import { defaultSetupConfig, useTrackedPageFactory } from '../helper'
 
 const page = readFileSync(new URL('../../app/pages/__ad-debug/popunder.vue', import.meta.url), 'utf8')
 
-describe('popunder debug page', () => {
+describe('popunder debug page', async () => {
+  await setup(defaultSetupConfig)
+
+  const createTrackedPage = useTrackedPageFactory()
+
   it('uses passive instrumentation and a same-origin post link', () => {
     expect(page).not.toMatch(/window\.open\s*=/)
     expect(page).not.toMatch(/window\.location\.(assign|replace)\s*=/)
@@ -13,4 +19,28 @@ describe('popunder debug page', () => {
     expect(page).toContain('data-testid="click-test-target"')
     expect(page).toContain('href="/posts/rule34.xxx?tags=rating%3Asafe"')
   })
+
+  it('injects Kadam without crossorigin', async () => {
+    const browserPage = await createTrackedPage()
+    await browserPage.route('https://hdbtop.com/code/hneuyk427249', (route) =>
+      route.fulfill({
+        contentType: 'application/javascript',
+        body: `window.__kadamLoaded = true`
+      })
+    )
+    await browserPage.goto(url('/__ad-debug/popunder?provider=kadam'))
+    await browserPage.waitForFunction(
+      () => document.querySelector('[data-testid="debug-report"]')?.textContent?.trim().length
+    )
+
+    expect(await browserPage.getByTestId('selected-provider').textContent()).toBe('Kadam')
+    await browserPage.getByRole('button', { name: 'Arm ads' }).click()
+
+    await expect
+      .poll(() => browserPage.evaluate(() => (window as Window & { __kadamLoaded?: boolean }).__kadamLoaded))
+      .toBe(true)
+    const script = browserPage.locator('script[src="https://hdbtop.com/code/hneuyk427249"]')
+    expect(await script.count()).toBe(1)
+    expect(await script.getAttribute('crossorigin')).toBeNull()
+  })
 })