Sub-ID tracking: splitting one campaign across every page you run

If you're running the same campaign's link on a homepage banner, a category page, and a weekly newsletter, and you're only looking at one combined earnings number for all three — you don't actually know which one is working. Sub-ID tracking fixes that, and it's one of the simplest changes a publisher can make to earn more from traffic they already have.

What a sub-ID is

A sub-ID is a short tag you add to your tracked link, unique to a specific placement. The network still attributes the click and any resulting redemption to you — it just also records which version of your link it came from.

https://track.reachoz.com/go/amz-2020?sub=homepage-banner
https://track.reachoz.com/go/amz-2020?sub=weekly-newsletter
https://track.reachoz.com/go/amz-2020?sub=category-electronics

Same campaign, same payout rate — three separate, comparable performance lines.

What it tells you that one number doesn't

• Which placement actually converts. A banner can drive far more clicks than a newsletter mention and still earn less, if the newsletter's audience is closer to buying.
• Whether a creative change worked. Swap a banner's copy or position, tag the new version separately, and compare its EPC against the old one directly.
• Which content earns, if you write reviews or guides. Tag each article separately and find out which one is actually sending redemptions, not just traffic.

A practical way to use it

You don't need a sub-ID for every single click — start with your three or four highest-traffic placements, run them for two to three weeks, and compare EPC across them. Reassign your best real estate (a homepage slot, a top newsletter position) to whichever tag is actually converting, and retire or replace the ones that aren't.

For advertisers, sub-IDs matter too

If a publisher is sending traffic from several channels under one link, sub-ID data is what lets you (or the network's fraud screen) spot that ninety percent of conversions are coming from one suspicious placement rather than the broad, legitimate audience the publisher described when they applied.

The takeaway

Treating all your traffic on a campaign as one number hides exactly the information you need to improve — which placement, page, or version is actually earning. Sub-ID tracking costs nothing beyond adding a tag to your link, and it's the fastest way to find out where to focus.