# Sybil resistance
***
QRbase detected a multi-accounting exploit where players were farming $SCAN by creating new low-level Farcaster accounts to avoid the timer difficulty that comes with leveling up.
### How it works
Every Farcaster account playing QRbase is checked against the **Neynar credibility score**. This score reflects how established and authentic an account is based on on-chain and social signals.
Threshold: 0.5
Accounts with a Neynar credibility score below 0.5 are placed in practice mode. Practice mode allows gameplay but does not award $SCAN or contribute delivered games to Scan Mode campaign progress.
### What this means for players
* Established accounts with normal activity are unaffected.
* Brand-new or low-activity accounts land in practice mode automatically.
* Building up your Farcaster presence (follows, casts, on-chain activity) over time raises your score.
* Practice mode lets new users learn the game without earning rewards until credibility is established.
{% hint style="warning" %}
Creating multiple accounts to bypass leveling is detected and blocked. All farming attempts land in practice mode with no rewards.
{% endhint %}
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