There was a clawback clause associated with the discount:
> The agreement made clear that Qualcomm would cease these payments, if Apple commercially launched a device with a chipset supplied by a rival. Furthermore, for most of the time the agreement was in place, Apple would have had to return to Qualcomm a large part of the payments it had received in the past, if it decided to switch suppliers. This meant that Qualcomm's rivals were denied the possibility to compete effectively for Apple's significant business, no matter how good their products were. They were also denied business opportunities with other customers that could have followed from securing Apple as a customer.
> The agreement made clear that Qualcomm would cease these payments, if Apple commercially launched a device with a chipset supplied by a rival. Furthermore, for most of the time the agreement was in place, Apple would have had to return to Qualcomm a large part of the payments it had received in the past, if it decided to switch suppliers. This meant that Qualcomm's rivals were denied the possibility to compete effectively for Apple's significant business, no matter how good their products were. They were also denied business opportunities with other customers that could have followed from securing Apple as a customer.