If it's a micro-payment system then fraud doesn't really matter because the risk per transaction is low. In an ideal crypto payment system there's no double spe

If it's a micro-payment system then fraud doesn't really matter because the risk per transaction is low. In an ideal crypto payment system there's no double spending and no charge-backs. The only cost in cryptocurrency is per-transaction fees due to limited network bandwidth (which can somewhat be mitigated with multisig setups).