Why Your Affiliate Link Works for You but Not for Visitors

Short answer: You are not a real visitor. You are logged in, on the right device, in the right country, and probably already cookied to the merchant. Real traffic carries none of that, which is why your test passes and the commission report still comes back light.

The five things that differ between you and a real visitor

1. Browser cookie policy

Safari blocks third-party cookies by default, and it also caps cookies set by in-page scripts at a seven-day life (ITP). Brave and Firefox strict mode block cross-site tracking in real time. The first redirect on most affiliate networks needs a cookie to be set — if it gets blocked, the click is anonymous and the merchant cannot pay anyone for it. For affiliate tracking that depends on cookies, attribution can lapse quietly for Safari visitors.

2. Country and currency

The CDN routes the click to a local store. If you tested from the US and the visitor is in Germany, the destination, the storefront, and the relevant tracking ID are all different. See our geo-redirect guide for the deeper version.

3. Login state

If you are logged in to the merchant, your session may already be cookied with an attribution. The merchant suppresses any new affiliate cookie because the existing attribution wins. Visitors arriving fresh do not have this problem, but you cannot test it that way.

4. Mobile vs desktop

Mobile clicks frequently get routed through the merchant\'s app via a deep link. The deep link can drop the affiliate ID entirely depending on how the network handles app handoff. Desktop tests miss this.

5. Ad blocker / privacy extension

uBlock Origin, Privacy Badger, and similar extensions block known affiliate tracker domains. The link still loads, the cookie never gets set. Estimated 20-30% of audience traffic now runs an ad blocker.

How to actually reproduce a real-visitor click

Open a fresh private window in Safari on iOS (or BrowserStack if you do not own a device).
Connect a VPN to a country that matches your top traffic source.
Clear all cookies for the merchant\'s domain.
Click the affiliate link from the actual page (not pasted into the address bar).
After landing, immediately add the cheapest item to cart and start checkout. Stop before paying.
Inspect the order summary URL or page source for the affiliate ID. If it is missing, the click is unattributed.

Fixes for each failure mode

ITP / cookie block. Move to a network that uses server-to-server (S2S) tracking. Impact, Partnerize, and CJ all support it.
Geo mismatch. Sign up to every regional program, or use a network with cross-region fallback.
Mobile deep link drop. Use the network\'s mobile-specific deep link format, not the desktop URL.
Ad blocker. No fix on the visitor side. The only mitigation is volume, more clicks means a higher absolute count of attributable ones.

Catch this without testing every time

PRG checks every monitored link from a clean, cookie-less server session — the same starting state a first-time visitor has, not the cached, logged-in state your browser holds. When the destination behaves differently for that clean session (different redirect, missing tracking ID, soft-404), you get an alert. Run a free scan to see your blind spots.

Frequently asked questions

Why does the link work for me?

You are usually logged in to the merchant, in the right country, on a desktop browser without strict cookie blocking. Most visitors hit the link from mobile, in another region, with a tracking-blocking browser. The conditions are not the same.

How do I reproduce a visitor's view?

Open an incognito window in a privacy-first browser (Brave, Firefox with strict mode), pick a country with a VPN, and visit the link. If it breaks under those conditions, real visitors are seeing the same thing.

Are cookies the most common cause?

For Safari and iOS, yes. ITP blocks cross-site cookies aggressively, which kills first-click attribution on most affiliate networks unless they are using server-to-server tracking.

Does this happen on cloaked links too?

Yes. The cloak still resolves to the same network redirect, which still drops cookies the same way. Cloaking helps with link rot, not with browser cookie blocking.