That's my point - with stripe, you don't have to deal with the exchange rate. You say "I want $X" and magic happens. Stripe takes care of the messy details of fluctuating exchange rates.
So that's not entirely true depending on how you use the product. We were attempting to use Stripe for a contract-like setup, e.g. person A pays person B, but person B doesn't get paid until some event occurs, and we hold on to the funds until that happens since that expiration of that event isn't guaranteed to be under 10 min.