35 Provision of an online marketplace for buyers and sellers of downloadable multi-media files containing digital art, music, text, videos authenticated by non-fungible tokens (NFTs); on-line retail store services featuring virtual goods, namely, digital art pieces, digital footwear, digital clothing, digital headwear, digital eyewear, digital bags, digital backpacks, digital toys, digital coffee mugs, digital blankets, digital helmets, and digital cushions for use in online virtual worlds; promotional advertising of products and services of third parties through sponsoring arrangements and license agreements relating to art, images, sound, audio, video, audiovisual and game files at sporting events