default value apportionment
choose default to minimise clearing
'only senders' or 'only receivers' charged
- halve transaction volume?
- requires industry-wide co-operation
- unstable - mavericks gain and increase costs of all
- multicast requires trusted receiver count [Holbrook99 etc]
'both sender and receiver' charged
- majority of comms between consenting parties
- value, charge and cost congruent
- stable against maverick policies
- doesn't match blame for unicast transmission...