When the liquidation engine takes over a position, it tries to close it in the market. Closing better than the bankruptcy price leaves a surplus, which grows the fund; closing worse leaves a deficit, which the fund pays.
Most venues publish the balance, and it is worth watching. A fund growing steadily suggests liquidations are being handled cleanly; one draining fast during a crash means the next stop is auto-deleveraging, where profitable traders have positions forcibly closed to balance the books.
A fund that grows very quickly is not automatically good news either, since it can mean liquidations are being executed at prices unfavourable to the liquidated trader. Either way it is a venue-level solvency signal that most traders never check.
Related: auto-deleveraging, liquidation, perpetual-futures, exchange-insolvency-risk