Erin the liquidator bot monitors the health of each leveraged position, and when it goes beyond designated parameters, she helps liquidate the position, making sure lenders such as Alice do not lose their capital. For this service, she takes a 5% reward from the liquidated position. At Alpaca, we also have an in-house bot for this which uses 100% of this fee for a buyback and burn of the ALPACA token. So even if you're unfortunate and have your position liquidated, if you're an ALPACA holder, you can feel relieved knowing your token is going up in value as a result.