Specifically with regards to the Protected Audience API (now renamed from FLEDGE), many visitors to a website might well have zero Interest Groups stored on their browser. This could be because they have not visited many commercially-relevant websites recently, or because they have cleared some data, or because they are in incognito mode, or because they have chosen to turn off the API using a browser-provided control. ...
Originally posted by @michaelkleber in #335

Why not make IG available in incognito mode? I thought they were privacy safe?