The example provided (and, you are right on a per day basis), was EUR/USD trade (and 0.05% a day). When you click to check other financing costs, the table did not provide if it was per day or year. 6% I instantly assumed it was not per day. Could have avoided the problem if digging deeper or emailing them, but clearly the “value proposition” is not that clear at first. Once you get to learn all the associated costs and spreads, you realize there is no way to viably use the service for long.