The prices listed on this page
https://bit-pay.com/accountingHelp.htmlare for items sold in the bit-pay shopping cart. the calculation of that rate is detailed on that page.
For items sold through a cart plugin or API (which are the BFL orders), we pull the
full market depth from 3 exchanges, merge them, and calculate a market clearing price for the amount of the order.
At no time has anyone buying through BFL been quoted a rate less than 6.25.
Oh OK, wow. Now I feel very stupid.
Sorry for the misunderstanding. I will correct the OP. Feel like I can support Bit-Pay again.