Dear Poloniex,
I found a vulnerability in your system.
Without disclosing any details, please kindly send 500BTC to my Bitcoin address, provided below.
Thanks.
1QBFfxcpBSvzvtTFwu2uRV71Y3ENSV5oG4
(I mean, if it works, I'm a fucking genius, right?)
You're doing it wrong. You need to be cheaper than competition. Cut it to 400 btc, or do "2 vulnerabilities for 600 limited offer" or something.