> For the complete documentation index, see [llms.txt](https://alliance-games.gitbook.io/alliance-games-gitbook/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://alliance-games.gitbook.io/alliance-games-gitbook/start-to-earn/contribute-and-earn-usdcoa-airdrop/referral-program/special-rewards-invite-friends-to-earn-usdt.md).

# Special Rewards: Invite Friends to earn USDT

Boost your rewards by inviting friends to join Micro Node through our **Cluster Reward** system! Here’s how it works:

1. **Invite Friends and Unlock Cluster Blocks**
   * Share your referral link with friends, and each successful invite earns you a **Cluster Block**.
   * Cluster Blocks can boost your earnings by up to **50 USDT** per invite!
2. **Earn a Cluster Booster**
   1. Each referral adds a **Cluster Booster**, increasing your reward score with every interaction.
   2. The larger your Cluster, the higher your potential rewards!

*Tip: Each Cluster Block opens up new reward possibilities—keep inviting to multiply your rewards!*