if you do see that you aren't making profits then why proceed?
He probably tried as long as he could to mine at a 'doable' loss. It is always a struggle in bearish high diff miner times.
at this time indeed to do mining must really pay attention to exchange price and consider electricity cost and repair of existing equipment when condition of cryptocurrency price which is already very cheap and electricity and maintenance cost goes up hence it is no longer profitable and makes many miners use the rig goes out of business.