This article examines the implications of the repeal of CNMV Circular 1/2022 following the entry into application of the MiCA Regulation, which establishes a harmonised framework for the advertising of crypto-assets within the EU. It outlines the new obligations for issuers and crypto-asset service providers, with a particular focus on the sports sector in Spain, where sponsorships and promotions are now subject to stricter transparency and oversight requirements. The article also explores the impact on clubs, athletes and instruments such as fan tokens and NFTs.