A lot of consent banner implementations have a clear accept all and then an intentionally obtuse alternative where you have to manually untick every "partner" you don't want to give data to. Presumably this is more profitable, as a lot of people will just click accept all instead of wasting their time.

A lot of people in the thread are speculating that this approach is illegal, but it seems to have widespread use across the web. Why doesn't DataGrail do this? Was it something requested by advertisers/management that your team pushed back on?