default value apportionment
choose default to minimise clearing
'only senders' or 'only receivers' charged
- halve transaction volume
- require industry-wide co-operation
- unstable - mavericks gain and increase costs of all
- multicast requires trusted receiver count
'sender and receiver both charged'
- majority of comms between consenting parties
- value, charge and cost congruent
- stable against maverick policies
- doesn't match blame for transmission...