The Sandbox Game’s Open World vs. RFOX VALT's VR-Enabled Retail and Entertainment Experience. Each metaverse has its own crypto-economy, with $SAND used in the former. At its core, the VALT is a retail experience, with your avatar walking (or hoverboarding) into digital shops with cashback rewards attached. The VALT avoids one-sidedness by acting as a hub linking together a portfolio of business ventures inside a metaverse. For example, you can partake in activities via RFOX Finance right now.