[miracle2k]

I think the way this would play out is that sites would attempt to only respect the header if consent is granted, and would prefer to still show the popup to those who set a header indicating to deny consent. In that case, it would be interesting to see what percentage of users are willing to deal to trade their data in exchange for being not bothered.

I would guess though that businesses would be wary that supporting such a header would legally put them in a position to also support a deny version of it.