Honestly I'm not a fan of international online shopping, I'm afraid my package will be lost. But knowing now reward.com, this make me tempt to order and just find an option for the payment. Who could resist huge rewards? You guys really know how to catch your customers.
I like your flight bookings and hotel accom though these are specifically in US so I can't book on unless I travel in US, lol. But seriously you got a nice concept here.
Yes there is a chance that you can lose your package, therefore you should select such a courier which is more trusted and you have already used for shipping. For example Ali Baba is the best option, which I think that the most trusted company, and hope that they can deliver your package very safe to you.
In fact in modern time we can expect to use online means of shopping throughout the world.