Currently, "qualified custodians" are mentioned as often also being "economic nodes" but as "economic nodes" "have power and influence which is proportional to the frequency and volume of payments received." I wonder who has power from physically controlling bitcoins. You can slap that onto "economic nodes" but if you want to distinguish the non-custodial exchanges like Changelly from Coinbase who offer custody as a service, it might make sense to treat custodians as separate stakeholders.
Currently, "qualified custodians" are mentioned as often also being "economic nodes" but as "economic nodes" "have power and influence which is proportional to the frequency and volume of payments received." I wonder who has power from physically controlling bitcoins. You can slap that onto "economic nodes" but if you want to distinguish the non-custodial exchanges like Changelly from Coinbase who offer custody as a service, it might make sense to treat custodians as separate stakeholders.