With the activation of Feature 19 voting (block height: 3720000), the transfer of 2 Waves from block rewards to the account (3PFjHWuH6WXNJbwnfLHqNFBpwBS5dkYjTfv) where XTN buyback and burn operations are executed has commenced. The block rewards received in this account are used to purchase XTN from the market and send them back to the Neutrino Contract.
This metric calculates how much Waves are spent from block rewards for the XTN buyback and burn operation, as well as how much XTN is removed from circulation using the spent Waves.