@Scythe:
Take note that it's a business so you must not neglect all expenses. I was asking for a logical math of how they earn yet don't lose because with such rates, I can't find the right computations as to how can the business survive with (as you say) 300+ units, the electricity, the maintenance of the units, and the legit softwares (that if they're using genuine ones).
Are all the units good? Do you know how much is the monthly bill for the electricity? Are all softwares legit?