From the second link: "Modern video games like Fortnite contain sophisticated economies that mix fungible tokens like V-Bucks with NFTs/virtual goods like skins

From the second link: "Modern video games like Fortnite contain sophisticated economies that mix fungible tokens like V-Bucks with NFTs/virtual goods like skins" Fortnite skins are different from NFTs - you're not supposed to sell them on. I just checked this with a quick Google search just in case the developer had changed how they work since I last played. They haven't, the way to sell skins is to sell your account details via an external market. Some games companies ban players from online matches who are caught buying or selling like that. I also found a site for buying /selling useful in game items, and the way that the item handover works is literally by making players meet up in game and the seller dropping the item on the floor. VBucks are just tokens that can only be spent in Fortnite and make it slightly harder for spenders to know how much they are spending on each thing. You get them slowly in game, and can also buy them with real money. You can only use them to buy different appearances and gestures, and only from the developer. I'd therefore argue Fortnite does not have a sophisticated economy, nor uses NFTs. It has a clever business model, using free download of the game as a whole but paid customisation, to help make it very shareable and very effective at gradually warming players up to the idea of making a purchase or five. It has become much like a shopping mall for modern teenagers - they willingly hang out there for hours for free, right next to places tempting then to purchase.