It limits the use of a unique device id that can be shared with third parties. AFAIK it doesn’t limit anything for Apple’s 1st party apps that include advertising, like Maps.
Notably Apple is spinning up a demand side platform (DSP) where advertisers can spend money directly on Apple platforms to place ads. That almost certainly means that platform will have full access to relevant user data for their ads customers.
dosboy0xff@infosec.pub 2 weeks ago
When that setting gets checked, the IDFA gets set to all zeroes per the developer docs. So it definitely doesn’t stop data collection or attempts to target, it just changes that one data point. Instead of an easy “this specific account is associated with this action”, you instead get “someone who clicked the opt-out button is associated with this action - you’re going to have to target them using other details”