In Cosign Consensus, the same decision is made by cosigners. Transactions are confirmed individually as users randomly select each other to cosign their inputs. There are no fees, and there is no inflation because there is no blockchain, no blocks, and no coinbase transactions. It's fully decentralized without staking or work, so it has no measurable impact on the environment.
Meaning consensus here will be made by local agreements between cosigners. Since the sender will have to Cosign along side some randomly selected cosigners and it is stated there are no fees, no block rewards no inflation, how do this cosigners get incentivized because it is obvious this will be a non-monetary participation?.