My lion browser adblocker blocks these.

Just mandate an opt-in default. If the “3–10% of people [that] want this”, wish to get out of their way and explicitly enable spyware, I believe this is a much more reasonable overall baseline (with respect to the other 90–97%). And considering most web-users rarely clear cookies, the preferences are effectively persistent already: which really appears to be the lobby’s primary interest. If people were conditioned by dark patterns to accept, while holding onto cookies, excessive data collection happens without user-awareness and potential for reevaluation.

I’m no fan of browser signaling, because to me it seems like yet another unique identifier: to potentially, and ironically be (ab)used to improve browser-fingerprinting.