35 Operating on-line marketplaces featuring digital gaming assets in the nature of characters, avatars, equipment, weapons, armor, tools, machinery, real estate, land plots, buildings, houses, vehicles, mounts, cosmetics, merchandise, skins, animations, apparel, gadgets, accessories for characters, accessories for avatars, crafting materials, consumables, pets, companions, currency, tokens, power-ups, special abilities, access passes, subscriptions, art, designs, user-generated content, custom levels, maps, digital certificates, digital titles, trophies, and certificates of achievement authenticated by non-fungible tokens (NFTs)