A more effective approach: government. California's SB 362 creates a single opt out starting 1 Jan 2026, audit obligations (mandatory 3rd party every 3 years w/ submission of failures to the CPPA, California's privacy enforcement agency), etc. Plus the potential of a $200 per day per request fine for failing to act on opt outs.
https://www.skadden.com/insights/publications/2023/12/califo...