There are cards with an empty balance. very rarely, but it happens. This problem is solved by purchasing several cards in one order.
I try not to attract much attention to myself and make two orders a month. Income from cloned cards is approximately 10-15 thousand dollars. I think some people earn a lot more, but I prefer to be cautious. I continue to work at my job, pay taxes, save money and will soon be able to become completely financially independent.