In this table, the first two trades (buy/sell pairs) are by some regular user with ID 238168. In the second trade, this user buys 0.398 BTC for $15.13. The next trade is some large market buy by Markus (ID 698630): note how the “$15.13″ value from the previous trade seems to “stick”; regardless of the volume of BTC bought, the value paid is always $15.13. This is speculation, but perhaps for Markus, the “Money” spent field is in fact empty, and the program that generates the trading logs simply takes whatever value was already there before. In other words, Markus is somehow buying tons of BTC without spending a dime.
Mt Gox closed over a year ago and was irrelevent to price discovery long before that.
What next? Blaming the guy who exchanged a pizza ten thousand btc? He should have charged more, he falsely overpriced bitcoin for the rest of eternity!!?
PS. what proof do you have other than a 'blog' that the Mt Gox 'bot' wasn't legitimate? There is a country called China that existed during the last bubble you might want to look it up.
Some say that the pizza didn't even taste that great, so definately some manipulation going on... Let's call it the overpriced pizza-bot.
All we know is, he's called