The old Base TIBBIR tax setter does not enforce its decrease-only comment; the replacement RateControl enforces an immutable fee ceiling and delayed numeric increases.This identifies absence of checks in source. It does not prove an owner ever raised the rate or demonstrate an exploit. Extreme input behavior was not simulated.TIBBIR UNIVERSE THIS IS TIBBIR How to get TIBBIR Ribbit in numbers Connected clues Account archive Bridge & contracts On-chain research Connections Community The story Reading room Network map Timeline Findings Source library Conversations People & companies Open questions Export & reuse