Aside from not having the option to purchase the Turbo subscription annually, the biggest downside for international users (like me) is the lack of options to pay in our own currency. Once we've paid to convert to USD, PLUS the conversion costs, it gets a lot more pricey than $8.99. My last short stint with Turbo was costing me $13.55 a month. That's far more than I pay for Prime. I'm going to want a whole lot more than just ad-free service for that amount.