Exit scam or not, we would all be well served to have more (crypto pair - non fiat) exchanges designed like Shapeshift. No account, just send your funds and you

Exit scam or not, we would all be well served to have more (crypto pair - non fiat) exchanges designed like Shapeshift. No account, just send your funds and your limit order. It stays on the order book until it's filled or until a brief timeout expires. No one needs to leave money on an exchange. If we need more liquidity, I'm sure some exchanges could use longer timeouts for larger orders.