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by dllthomas 4313 days ago
The cost of mining blocks is designed to remain roughly consistent as technology advances. The "economy of scale" comes in when you use one block (which costs about the same regardless) to secure more transactions.

As an aside, "economy of THE OPPOSITE OF SCALING" is probably better termed "diseconomy of scale" (http://en.wikipedia.org/wiki/Diseconomies_of_scale).