This article was about retail customers and exchanges. Sounds like they made not much money with that. What the article left out is that everyone learned that

This article was about retail customers and exchanges. Sounds like they made not much money with that. What the article left out is that everyone learned that this type of race arbitrage can be done. As a result a number of private microwave networks was build and this type of trade is done on a much larger scale between the exchanges now prompting institutional investors to question the fairness of the deal they are given.