Papertrade, a synthetic perpetual contract platform built on Hyperliquid’s HyperEVM, suffered a $1.28 million exploit on its October 10 launch day after a trader manipulated prices to profit from 1000x leverage positions. The attacker deployed only $52,000 in capital, buying 6,060 ETH to push prices up 0.12% before opening $297 million in short positions and selling 6,590 ETH to drive prices down. This incident has intensified debate over the protocol's "losses as mining rewards" model, where winning traders are paid from a liquidity pool funded entirely by user losses and liquidations. The platform’s open interest has since collapsed 88% from over $3.3 billion to approximately $400 million as airdrop farmers and professional traders extracted value and exited. Critics argue the model relies on a continuous influx of losing traders to remain solvent, with profitable withdrawals subject to a FIFO queue when pool capital is insufficient. While early data showed $25 million in staking rewards distributed against estimated net losses of $18–$30 million, the recent exploit and subsequent liquidity drain suggest the mechanism remains vulnerable to adversarial extraction and market volatility.