What is the ruling on eating food purchased by a person using a credit card, knowing that the company does not charge interest or an increase for three months, but after the three months there will be an increase? And what is the ruling on eating if there is already interest involved?

"Using a Visa card is permissible if it is free of charge. However, if the issuing entity charges interest (other than the issuance fee), then it is not permissible to use it. Furthermore, it is not permissible to consume what has been purchased with it if it is known that it was bought with usurious money. It is akin to something bought with wine. This is the view of the Shafi'is and the Hanbalis."