Affiliate Link Expiration: How to Detect Dead Campaigns

Short answer: Affiliate links rarely 404 when they expire. They redirect to the merchant's homepage, drop tracking, or quietly stop attributing — meaning your link still "works" but pays nothing. Catching this requires tag and parameter validation, not just status codes.

The silent expiration problem

Most "broken affiliate link" tools only check HTTP status codes. But the most common failure mode in 2026 isn't a 404 — it's a 200 OK that quietly fails to attribute. Examples:

• Brand pulls out of an affiliate network → link still resolves to the brand site, but no commission is tracked.
• Your network ID is suspended → tracking parameters are dropped at the destination.
• Campaign ended → merchant redirects to a generic homepage instead of the offer.
• Cookie window shortened from 30 days to 24 hours without notice.

What "expiration" actually looks like

1. Redirect to homepage. A campaign-specific link starts redirecting to brand.com instead of brand.com/your-offer.
2. Tracking parameters silently dropped. Your utm_source or affiliate ID is gone from the final URL.
3. Tag mismatch. The destination loads, but the merchant's analytics doesn't see your click.
4. Status code 200 with "deal ended" page. Soft 404 — looks healthy but isn't.

How to detect expiration automatically

You need a checker that does more than ping a URL:

• Follows the full redirect chain and confirms tracking parameters survive each hop.
• Validates the destination URL pattern (e.g. for Amazon, confirms the ASIN is still valid).
• Runs automatically on a schedule — you don't pick a cadence. PRG checks links on a schedule set by your plan, and links that look unhealthy get rechecked sooner than links that look fine.
• Alerts on parameter changes, not just status changes.

Run a free scan to see how many of your "working" links are quietly expired.

Related: Missing UTM Parameters · Amazon Tag Disappearing