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Yes. Probably they will be free. Bitpay offers BIP70 for free to its merchants.

• maxerickson 12y ago
  So that means they build the cost into their pricing, right?
  • brighton36 12y ago
    Yes. If you want a more exact number, it's probable that the charges will be significantly less than typical miner tips. It may even be absorbed by miners in order to give the miner a better lead-time on entries in the mempool.