The amount is really small.
At the firm level, the maximum that a business can get from this is $2,200. This is a company that would have a payroll of about $600,000 a year. An amount of $2,200 for a firm that has a $600,000 payroll is not really the kind of money that would affect their decision-making process, or hiring or firing decisions.
Also, if you want to hire an employee, with the assumption of a $50,000 salary, that would save the business only about $195, based on this credit. It's not big enough to create any kind of incentive.