Each ecosystem infrastructure participant (Publishers, dDSPs, dSSPs, Auditors, Ad Agencies, Advertisers) needs to lock a specified minimum amount of Papyrus tokens as a security deposit (Proof-of-Stake) in Papyrus registry. This minimum amount depends on the volume of payments flowing through the participant, for greater volume participants needs greater PoS deposit. There is a default minimum for new registrants of each type. To ensure more trust, improve reputation and get higher ratings registrants are incentivized to make higher deposits. This ensures that demand for Papyrus tokens will grow with the growth of the amount of connected participants and volume of the paymentstraffic and payments turnover going through Papyrus-enabled components.