How does Saito solve the tragedy of the commons?
The tragedy of the commons is a collective action problem that lets private individuals deplete group resources. In blockchains, it happens when people can pay once and put something on-chain forever—creating a long-term cost for other node runners.
Saito has a circular blockchain where old transactions must compete for new space. This makes it so that everyone pays market rates and nobody can pass costs onto others in the future.