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Lesson 1 of Gacha & In-App Purchase Pack · about 5–7 min

🎧 Start with audio (about 20 min · optional)

Why "Just One More Pull" Never Ends

What "just one more pull" actually costs you

Variable Reward & Sunk Cost

"Just one more pull" in gacha is the same trap as a slot machine

First: what is gacha? The word comes from Japanese capsule-toy vending machines — you put in a coin, turn the handle, and get a random surprise. Digital gacha works the same way: you spend in-game currency (or real money) and receive a random character, weapon, or item. It goes by different names — loot boxes in Fortnite, player packs in FIFA Ultimate Team, pulls in Genshin Impact — but the mechanic is identical everywhere. Gacha works because you win sometimes — not always, and not never. That's the same principle as a slot machine. It's called the variable reward schedule. Then there's a second trap: sunk cost. After five losing pulls, it feels wasteful to stop now. But gacha odds reset every single pull. Five losses don't make the sixth pull any more likely to win. That "I've already spent too much" feeling is exactly what leads to even bigger losses.

Where this trick lives

Game gacha (5-star drop rate: 2%, etc.)

A 5-star character has a 2% drop rate. That means an average of 50 pulls for one win. And no matter how many times you think "this next one," the odds reset every single time.

Check it out

In the gacha screen of a game you play, look for "drop rates" or "odds." What's the 5-star percentage?

Claw machine

"It looks so close to falling…" → "just one more try." But each attempt resets — that "so close" feeling is often an illusion.

Pokémon booster packs & FIFA Ultimate Team packs

After a few bad pulls, it feels like "I'm due for a good one next." But each pack has the exact same odds — no memory, no fairness, no streak bonus. That's the gambler's fallacy.

Check it out

Try rolling a die. If you don't get a 6 three times in a row, does it feel like "the next one has to be a 6"? The odds are still 1-in-6 every single time.

Daily login rewards in mobile games

Log in 7 days in a row for a big reward. You don't want to break the streak — so you log in every day. "I've come this far" is sunk cost at work.

Calculate What Gacha Actually Costs

Find the drop-rate disclosure for a gacha you play. Then calculate what it would cost to reliably pull one 5-star.

Tip for parents

If your child is surprised by the number, just share the fact: "Yeah, that's how game companies make money." No need to criticize. Just be surprised together. That's the whole point.

Sound familiar?

For parents

These behaviors show up in kids AND adults — anyone who plays gacha has felt at least one. Spotting them clearly is step one — no blame needed.

Look back together

After calculating what 100 pulls would cost — how did the number feel?

When you think "just one more," is it because it's fun — or because you don't want to stop after a loss?

Name three things you could buy with the money you'd spend on gacha.

You reached the end of the trial lesson

4 more tricks built into every gacha game.

Coming next in this pack: when real money becomes gems, "limited time only" pressure, battle passes that sell a daily obligation, and "I've spent too much to stop now."

Create a free account to take the Bias Assessment and see which tricks affect your family most.

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