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2% less fee, than credit card. It's enough to take over the payment world. And it's only one of the advantages.

The 0.0001 BTC Transaction fee tacked on to every BTC exchange is only going to get worse and worse as BTCs's exchange rate goes up btw.

What used to be a rounding-error that happened on every BTC transaction is now a $0.10 tax on every BTC transaction. If BTC continues to deflate, the transaction fees on BTC are going to become quite sizable.

This is a known issue. The current design around smart fees is described here: https://gist.github.com/gavinandresen/6548612

The high level idea is to introduce market mechanics to bitcoin fees, with the expectation that competition will drive prices down.

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