may incentives sa merchants yan. my guess is that it's the cc company that basically is issuing you an interest free loan. you get the goods, the merchant gets paid in full, and you pay the cc company the installments.

the merchant doesn't assume any of the risk of default, regardless of whether you charge the full amount on your cc, or if your cc company agrees to offer you installments.

kung di ka magbayad, yung cc company ang talo. but that's their cost of doing business.