VGOUnbox offers two kinds of case opening: official or custom vgo cases. Official cases don’t require any explanation. You can exchange your VGO Skins for what they have in their trade market which is pretty cool if you’re collecting skins and want to get them all. Skins received from opening official VGO Cases are transferred directly to your OPSkins account. Other Skins (from trade or custom cases) can be withdrawn from the site’s inventory.