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The fee's will still often be small compared to using Western Union for people who are sending money home.
This. Some of my Dev team are unbanked in their home country and Bitcoin offers far better fees than Western Union and the alternatives.
Edit: They also get far better exchange rates on exchanging BTC for USD than they do from banks and money transmitters. (Given that the local currency is not desirable)
Stonehedge
Surely anyone sending small amounts is using XRP, Nano, RSR, LTC etc. No one is sending small amounts using BTC or ETH. The fee's will still often be small compared to using Western Union for people who are sending money home.