Reducing CPA while increasing first-time deposits (FTDs) is the goal of every iGaming campaign. For casino and betting advertisers, popunder traffic is one of the most effective ways to get there: it delivers volume cheaply, generates data fast and, with the right setup, turns into depositors at a cost you can scale.
This guide explains what popunder traffic is, why it works for casino and betting offers, and the exact steps advertisers use to bring CPA down and FTDs up.
What is popunder traffic?
Popunder traffic is an ad format where your landing page opens in a new browser window or tab behind the page the user is on. Unlike intrusive pop-ups, popunders stay hidden until the user closes or minimises their current tab, which gives better engagement with less annoyance.
For betting and casino affiliates, popunder traffic is a cost-effective way to reach users on entertainment, sports, streaming and gaming websites.
What are the benefits of popunder traffic for casino and betting offers?
1. High visibility and engagement
Popunder ads get full attention because the landing page opens in its own window. Unlike banners or in-page units that users often ignore, a popunder is visible when the user is ready to interact.
2. Lower costs than many other ad formats
Popunder traffic is usually bought on CPM (cost per thousand impressions), and CPMs are generally lower than push or native. Advertisers get high traffic volumes at a low cost per visit, which is ideal for testing casino and betting offers affordably.
3. Strong conversion potential for gambling offers
Popunders reach users on entertainment, sports and gaming sites, people who are often already interested in gambling-related content. With a strong lander, that interest converts into registrations and deposits.
How do popunder ads work?
Unlike pop-up ads, which appear above the page, popunder ads load behind the user's current window:
- A user visits a publisher's website.
- Your landing page opens automatically in a new background tab.
- When the user closes or minimises the original site, your page is revealed.
This less intrusive approach keeps the experience smoother while still guaranteeing visibility.
Popunder vs popup ads: which one is better?
| Feature | Popunder ads | Popup ads |
|---|---|---|
| User experience | Less intrusive | Disruptive |
| When it's seen | When the user finishes on the current page | Immediately |
| Conversion potential | Higher for casino and betting | Lower, users close it instantly |
| Cost | Low CPM | Similar CPM, weaker results |
For casino and betting offers, popunder ads are the clear winner because of better engagement and lower cost per result.
How do you reduce CPA and increase FTDs with popunders?
Step 1: Track the deposit, not just the registration
Set up two S2S postbacks, one for sign-up and one for deposit. Optimising on registrations alone is the fastest way to buy cheap sign-ups that never pay. Our S2S postback guide covers the setup.
Step 2: Start on a pre-vetted whitelist
Instead of testing every zone, start on a whitelist of placements already proven for casino or betting. It shortens the testing phase and cuts early CPA.
Step 3: Split by device and OS
Mobile and desktop users behave differently, and so do iOS and Android. Separate campaigns make it clear where deposits come from.
Step 4: Cut zones fast, scale winners gradually
Use SubID data to pause zones with spend but no deposits within the first days, and raise bids on zones producing FTDs in steps of 20 to 30%.
Step 5: Let deposit-based optimisation work
Once enough deposit data builds up, FTD Magnet AI optimises toward first deposits instead of clicks. In our published case study, deposit-based optimisation delivered up to 8x higher conversion rates and up to 5x lower cost per event than manual bidding.
What are the best practices for popunder ads on casino and betting offers?
1. Use fast, focused landing pages
A fast-loading, mobile-optimised landing page with one clear CTA and the bonus above the fold can significantly boost conversions.
2. Choose GEOs with the right balance of cost and quality
| Tier | Example GEOs | What to expect |
|---|---|---|
| Tier 1 | United Kingdom, Germany, Canada | Higher CPMs, higher player value, strict rules |
| Tier 2 | Spain, Mexico, Poland | Balance of cost and quality |
| Tier 3 | Indonesia, India, Thailand | Large volume, low CPMs, lower player value |
Always check that the operator is licensed in the GEO you target. Markets can close fast: Brazil banned fixed-odds betting and online casino, including advertising, with Provisional Measure 1.394 on 25 September 2026.
3. Leverage A/B testing
Test different landing pages, headlines and bonus angles to find the highest-converting combination for each GEO.
4. Monitor performance and adjust bids
- Use CPM bidding to control traffic cost
- Raise bids for placements producing deposits
- Review results by zone regularly and remove non-performers
Why buy popunder traffic from Traffic Nomads?
Traffic Nomads is a self-service ad network built exclusively for iGaming:
- Popunder traffic for casino and betting on iGaming-only inventory
- Advanced targeting by GEO, device, OS, browser, carrier and more
- SmartBid for automated bid adjustments based on performance
- Second event tracking of sign-ups and deposits
- Pre-vetted whitelists for casino and betting, kept current with White List Auto-Update
FAQs about popunder traffic
What is popunder traffic?
Popunder traffic is an ad format where the advertiser's landing page opens in a new window behind the main page, giving high visibility without interrupting the user.
How much does popunder traffic cost?
Popunders are usually bought on CPM. Prices depend on GEO, device, audience and competition, with Tier 1 markets costing the most. Our casino traffic cost guide shows the CPM ranges we see by GEO tier.
Is popunder traffic good for casino and betting?
Yes. It is one of the most cost-efficient traffic sources for casino and betting because it reaches large audiences on entertainment and gaming sites and produces data quickly.
How do I optimise popunder ads for conversions?
Use fast landing pages, track deposits, target GEOs where the offer is licensed, test creatives and landers, and adjust bids by zone.
For the full setup, read our pop traffic guide for iGaming.
Get started today
Ready to lower your CPA and grow FTDs with popunder traffic built for casino and betting?
