An Airbnb host had to ban crypto mining after guests racked up a $1,500 electric bill

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• Airbnb host Ashley Class said she had to ban crypto mining at her North Carolina property.
• She said guests ran up a $1,500 electricity bill after bringing many computer rigs into the home.
• The guests, who made $100,000 during the stay, eventually paid her back, Class said.

Some Airbnb hosts have long lists of house rules...