It still wouldn't have been free. The free download allowance is spread daily across the entire month. That is, you can download 5% of your data per month, and

It still wouldn't have been free. The free download allowance is spread daily across the entire month. That is, you can download 5% of your data per month, and only 0.16% of it per day. For your optimization to work, you'd have to retrieve your data over 30 days for it to be free.