The major difference between decentralized pyramids and centralized ones is the size.
The bigger the size of a network, the more attractive it is to abusers, while at the same time being more difficult to manage.
The bigger the size of a network, the more attractive it is to abusers, while at the same time being more difficult to manage.
Typically, they are constrained by some limitation like being for an offline group or requiring a vouching process to join.