SN-2710 已核对来源，附原文与上下文。
另一个选项是降低每个区块允许的免费交易数量，超过之后才要求手续费。节点每个区块只接受一定 KB 的免费交易，超过后就开始要求至少 0.01 手续费。
Another option is to reduce the number of free transactions allowed per block before transaction fees are required. Nodes only take so many KB of free transactions per block before they start requiring at least 0.01 transaction fee.
这个门槛应该比现在更低。
The threshold should probably be lower than it currently is.
我认为门槛永远不该是 0。我们应该始终允许至少一些免费交易。
I don't think the threshold should ever be 0. We should always allow at least some free transactions.
