eBay has decided to ban digitally delivered goods listed on eBay.com.sg due to the high risk they pose in undermining eBay’s Feedback System.

Digitally delivered goods are often reproduced at little to no cost to the seller. On eBay, this creates the potential for feedback manipulation (both real and perceived). To preserve the integrity of the Feedback System, all goods that can be digitally downloaded or transferred electronically will be banned on eBay.com.sg, effective from April 16th.

More details of the policy can be found here.