Snapchat has explored plans to skirt Apple's new privacy rules and continue tracking users, making use of banned device fingerprinting techniques rather than the IDFA identification number.
Some of Apple’s new privacy rules have gone active ahead of iOS 14.5, and the most recent looks to make device fingerprinting a thing of the past on the App Store.
Facebook insiders comment on the battle against Apple's IDFA tracking changes. Biggest concern is that it will lose the ability to track the connection between ads shown on Facebook and sales made elsewhere.