Certain ads on HashUp platforms are tied to associated NFT collections. Suppose that a 365 NFT collection represents 365 consecutive days. By owning an NFT with an index of 10, we "own" the day of January 10. This allows us, as the owner, to freely design the content of the ad. The advertising days issued in this way are auctioned on the GameContract.io platform. The highest bid wins. Ads can only be bought for # and all the profit is then burned, which is an important demand factor in the long run. The number of # used to pay for the advertising day is public, so ads that burn a lot of # are usually clicked more often by users of the platform. Of course, the HashUp platform reserves the right not to display content that does not comply with the terms of the platform and the applicable standards.