> For the complete documentation index, see [llms.txt](https://whitepaper.nudix.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whitepaper.nudix.io/nft-utilization/nft-usage-concept.md).
# NFT Usage Concept
**NFT as Proof of Investment:**
After investing in a project, the investor receives an NFT that defines their rights to a share of the game’s revenue or other benefits. This NFT can also indicate the investor’s tier level and privileges on the platform.
**SBT for Age Verification:**
Soulbound Tokens are issued for user identification (e.g., to access premium content) after completing KYC/AML processes.
**NFT for Limited Editions:**
Developers can issue collectible NFTs (game keys, exclusive content, or characters) that users can own but cannot resell, ensuring a direct link between the owner and the game.
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