IDFA is the only way to identify the IOSdevice’s Access information provided by the end user. Therefore, it is necessary in to provide a parameter name in the Tracking link to return IDFA specific value back to FuseClick, while Integrating with the affiliate system.
For example: FuseClick system decides to use s2 as a parameter to get the IDFA value, The Affiliate will add &s2=idfa value in the Tracking link provided. And it will be passed through the S2 into the FuseClick, you can see the specific value of S2 in Report.