So, essentially bitpay only performs certain jobs that a full exchange does, and not the full spectrum. This argument brings us to a question.... What truly defines an "exchange"? Surely there are other sites and programs that provide more of the spectrum than others, yet many opf the ones that are lacking are still considered "exchanges". I mean technically isn't it an exchange by definition just by providing the possibility of purchasing goods and services for a currency?  i mean there is an "exchange" happening in that equation.