Original Paper: Newall et al., “Sludge, Dark Patterns and Dark Nudges,” Addiction, 2025 →

This is part of our Research Series.

What the Researchers Did

A team of researchers published a peer-reviewed taxonomy in the journal Addiction cataloging every deceptive design feature they found in online gambling platforms. They analyzed the apps and websites of major operators and classified each manipulation tactic.

What They Found

The list reads like a playbook for psychological manipulation:

Deposits are instant. Withdrawals have friction. Putting money in takes one tap. Getting it out requires multiple steps, waiting periods, and verification. This asymmetry ensures money flows in much faster than it flows out.

Emotional-state detection. When your betting speed slows down — a sign of hesitation — algorithms detect this and serve targeted “encouragement” pop-ups. The app literally notices when you are about to stop and intervenes.

Fake progress bars. Bonus unlock meters and VIP progression systems that look like they are about to pay off but are designed to never deliver meaningful value. They exist solely to keep you engaged.

“Credits” instead of currency. Many platforms use tokens, credits, or points instead of showing real dollar amounts. This creates psychological distance from your actual money, making it easier to bet more.

Rapid-fire micro-bets. Options to bet on the next pitch, the next play, the next point. Each micro-bet degrades higher-order decision-making by keeping you in a reactive loop instead of giving you time to think.

The Bigger Picture

These are not bugs or oversights. They are features. Each one was designed, tested, and optimized by teams of product designers and behavioral psychologists. The goal is not to give you a fun experience. The goal is to maximize “time on device” and money spent.

Scientific American reported that within four years of a state legalizing online sports betting, residents' average credit scores drop 1% and bankruptcy filings increase 25 to 30 percent. These are not coincidences. They are outcomes of systems designed to extract money from people who cannot afford to lose it.

What This Means for Your Recovery

You were not outplayed. You were manipulated by a system specifically designed to override your rational decision-making. Understanding this is not an excuse — it is context. The same awareness that makes you angry at the industry can fuel your recovery.

Blocking gambling apps removes you from the manipulation environment entirely. You cannot be nudged, sludged, or dark-patterned if the app is not on your phone.

Read More Research

Ready to start your recovery?

Download NoBet