Yes, metaverse marketplaces can be profitable for their developers. The growth of the NFT market and increasing adoption of the metaverse has created a new opportunity for creators and developers to monetize their digital creations and experiences. By offering a platform for buying and selling NFT assets, developers can generate revenue through transaction fees and other sources. Additionally, the development of unique and engaging virtual experiences within the metaverse can attract users and create opportunities for monetization through in-app purchases, advertising, and other methods.