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Run a giveaway with a winner-selection process people can actually trust.

Picking giveaway winners by hand looked biased and didn't scale to repeated promotions.

Tech Domain · Book Dev|Published|Evidence: Live|Next.js, TypeScript

A public deployment is available to try.

Case Study

Before

Running promotional giveaways for the portfolio audience required a fair, transparent selection process. Manual winner picking looked biased and didn't scale for repeated promotions.

After

Automated fair winner selection that builds trust with the audience. The referral entry mechanism extends each giveaway's reach beyond the initial audience, since entrants who refer others bring new participants in.

How it's solved

Built a giveaway system with entry collection, configurable end dates, weighted random winner selection, and a public results page. Supports multiple entry methods (email, social follow, referral).

Trade-offs

Winner selection trusts entry data at face value — no fraud detection for duplicate or fake entries.

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Giveaways - Chaowalit Greepoke Portfolio