Everything on Strike is handled automatically by smart contracts, which act to mint sTokens after Ethereum and ERC20 assets are deposited, and allow Strike users to redeem their stake using their sTokens.
The protocol enforces a collateralization factor for all assets supported by the platform, ensuring each pool is overcollateralized at all times. If the collateral falls below the minimum maintenance level, it will be sold to liquidators at a 10% discount, paying down some of the loan and returning the remainder to an acceptable collateralization factor.
This arrangement helps to ensure borrowers maintain their collateral levels, provides a safety net for lenders, and creates an earning opportunity for liquidators.