If this was being handled honestly and straight forwardly this would just be a preference set in the browser they complied with. Then someone who was never accept could just be that way, someone else could always accept and others could choose once for each site. But then we had that with headers and such and we all know they just ignored it, because the entire point is to steal the data as often as they can.
But a lot of people think that it’s supposed to be all or nothing with cookies (not: required (login cookies) and non required (ads)). So if you opt out, people think they’re not allowed to store a cookie saying you opted out.