> That would make sense to me. I wouldn't even be surprised if some registrants are unable to pay in USD or if they get charged exorbitant fees for foreign exchange.

To clarify, I wasn't suggesting that the registrants in foreign countries pay in USD and potentially pay forex fees, merely that the underlying USD price be exposed to them so they are aware of what the future renewal price will look like as the exchange rate shifts. They'd still always be paying in local currency.