At first, guests who checked into one of Class's rentals in Charlotte, North Carolina, presented no red flags. They were 'five stars all the way,' Class said, with no issues or hiccups during their stay.
Class went back and looked at footage from her outdoor camera, and saw that the guests had hauled in at least 10 computer rigs, which she later figured out were for crypto mining.
Cryptocurrency mining requires individuals to solve complex mathematical equations to receive shares of digital cash. Many crypto 'miners' employ supercomputers - which use tons of electricity - to solve these problems as quickly as possible.
"It was cheaper for them to rent a house than to pay for that electricity," Class said in her video.
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