The presence of an Automated Teller Machine (ATM) in a business can be extremely beneficial in retail businesses that require or prefer that their customers pay with cash. Unlike vending machines or toy machines where a proprietor benefits solely from the rental of the space or from the direct profits of the machine, ATM's provide a host of other benefits to the proprietor. Increased Sales. Studies show that an ATM can increase a business' sales as much as 8%.Cash Retention. 25% of the cash withdrawn from an ATM is spent on the premises. Cash does not bounce. When a customer uses cash from an ATM it cuts down the charge backs, disputes, returned checks, and the stress associated with these incidents.