They work like Public Auctions but are managed by users who choose the vCards to be auctioned with customized parameters, such as: Auction duration time; Auction Base Value ($ABV); Auction Reserve Price ($ARP) and decide at the end of the auction if the vCard is not awarded whether to activate a second experiment or not.
At the end of the Auction the vCard has a different Market Value.
This value is the value at the end of the auction, so if it is awarded it can have a higher value than the starting value, but if it is not awarded the system lowers it by $ 0.5.
The CHO.earth system, as in Public Auctions, by default gives the Auction Base Value ($ABV) reduced by 0.5 $ of the value of the vCard, but the user can choose to further lower it or to raise it (Maximum variation is +/- 20%).
The Auction Base Price ($ABP) is the Auction Base Value ($ABV) of the vCard reduced by $ 0.5.