But is that enough to make a coin suddenly have almost 1.5 million dollars in volume over a 24 hour period?
Then someone would be able to make a lot of money by simply buying whatever coin Bittrex decided to put on its front page, and then dumping it. Repeating the same process the next day.
Bittrex didn't "decide" to put Goldcoin on its front page. Goldcoin was displayed on the front page because it was the exchanges's largest % gainer.