The payment methods you can choose from are ultimately up to your research moderator, but the most common ones are PayPal, Virtual Visa, and Amazon. All three of those are great options to get the full amount of your reward and spend it, but virtual visa is primarily meant for online purchases, not in a physical store.
In some cases, the Virtual Visa may have the option of mailing you a physical card, for an additional fee, but we cannot guarantee that for every reward, as it's up to the visa provider. That's why PayPal or even U.S. bank deposit are better ways to get the full amount, so you can spend your reward however you would like.