Des Moines Register: Starting next year, those pork chops on a stick can be bought with a card. The Iowa State Fair has confirmed that it will require all food and drink vendors to accept credit and debit card payments beginning in 2020. Cash has long been the dominant method of payment for the fried cheese curds, corn dogs, and scores of other foods bought by fairgoers. But the fair recently informed concessions vendors that they will be required to use Clover cash registers starting next year that accept credit and debit payments. They will have the option to use the small machines at this year's fair, which begins Aug. 8.