Summary

• Adds a new Zcash use-case page for the global gaming ecosystem
• Explains how transparent microtransactions can expose player metadata, spending, timing, and social links
• Covers shielded ZEC use cases for in-game purchases, creator tips, esports prizes, community treasuries, and marketplaces
• Adds developer architecture guidance, player/studio best practices, and research links

Fixes #1557

Testing

• git diff --check

Payout

• Public Zcash unified address can be provided in a follow-up comment if this bounty is accepted.