An Airbnb host said her guests made $100,000 mining cryptocurrency during their stay — and racked up her electric bill.NurPhoto/Getty ImagesAirbnb 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, which can range from no pets to instructions on how to change the linens before you leave.One North Carolina host has had to add another: no cryptocurrency mining.On July 30, Airbnb host Ashley Class said in a video posted to TikTok that she had banned crypto mining in her short-term rentals after a bizarre guest experience.