The reason it will save them money is because there are no "chargebacks" or reverts with bitcoin. You get $10 worth of bitcoin in your account and it's confirm

The reason it will save them money is because there are no "chargebacks" or reverts with bitcoin. You get $10 worth of bitcoin in your account and it's confirmed, you have $10 of bitcoin, and nobody can take it back. That, plus the lack of a 3% fee (although there might be one for their bitcoin processor) means a good amount of savings for some.