the point of 2xDS3 was specifically to get major services, and not to get every basement dual-homer. do the latter and you have the same grazing of the commons as we have today.
major services often equals large pipe size, but not always. rather than setting the baseline at pipe size (which essentially indicates a cost), make the cost of the miroallocation high enough to discourage mass uptake by said backyard dual-homers.
randy
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