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I do not know that answer directly and I would not want to speak for the Genesis Mining company. I am sure if you call them or email them directly they will answer that question. I've seen a lot of videos saying their customer service is great, but have not previously had a reason to contact them myself.

someone has to pay the cost of production. renting some hardware that will last 5x longer than you rent it for a high price is very lucrative ... they still make loads of profit!