Technique · Actionable Gamification
Anchored Juxtaposition (GT#69)
Show two routes to the same reward side by side: pay now, or complete Desired Actions that help the system (invite friends, finish a profile, stay active). Many users start on the effort path, tire, and some pay, so the business gains either way; Dropbox's storage offer is Chou's example.
Plain label: pay now or earn itAlso known as: Anchored Juxtaposition, pay or earn
How it works
The paid option is anchored against a visible amount of effort, so paying feels like buying back time (CD6), while the earn path gives free users agency and strategy; Chou later pairs it with CD3 rather than loss. Both options must be visible: pay-only triggers anger and denial, effort-only looks self-serving. The reward should be worth paying for, ideally a Booster, and a grinding or unfair earn path breaks the balance.
What the research says
Dropbox let users pay for space or earn it by inviting friends; Chou reports most invited first and many later paid, alongside a reported $10B valuation and $200M+ revenue in 2013.
AG Ch10 citing press reports (grade C; many causes behind the growth), 2013
How to build it
- B2B
- 'Unlock now with Pro, or earn it with 14 days of active use', both shown on the locked feature.
- Web
- 'Featured listing: pay $9, or complete your profile and collect three reviews.'
- Mobile
- 'Refill now for $1, or ask three friends.'
What can go wrong
- An earn path that is a deliberate grind.
- Pay-only offers that trigger anger.
- Effort paths built on spammy invites.
Pairs well with
- Make the reward a booster (GT#31).
- Pair with GT#44 Dangling so users know the reward exists.
In practice
Where it shows up
Dropbox · 2010
Dropbox: a referral reward that is the product
Sign-ups reportedly about 60% higher with two-sided storage rewards, and about 2.8M referral invites in one month of 2010 (secondary sources; grade D). Retellings disagree on the endpoints, so avoid the “3,900% in 15 months” headline.
M3 ×SpreadCase grade for the number: D. Evidence grade for the mechanism link: D.Anecdote
Limits
What we don’t claim
- Octalysis is a practitioner framework built from observing games, not a validated scientific model.Actionable Gamification Ch.15, pp.399-400
- Left Brain and Right Brain are a metaphor for extrinsic and intrinsic motivation, not a claim about neuroscience.Actionable Gamification Ch.13, pp.342-343
Sources
Actionable Gamification · Yu-kai Chou
Ch.10, p.250 · Ch.10, p.251 · Ch.10, p.252 · Ch.12, p.337 · Ch.17, p.476 · Ch.10, p.230 · Ch.7, p.123
Book content is paraphrased, never quoted at length. Last verified October 24, 2026.
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