That thread between FB & Apple is fascinating. The potential solutions being discussed have significant implications:
1. Apple: "not support eTLDs in PCM and only support TLDs" - so no more ad attribution for multi-tenant domains.
2. Facebook: "some sort of vetting process to determine who is using subdomains in a way that is aligned with the intended purpose of the PSL" - so Apple takes over the PSL inclusion process and institutes strict vetting to prevent abuse of PCM, which would presumably take months to implement.
This looks like a serious design problem with no solution that could be implemented before ATT drops.
1. Apple: "not support eTLDs in PCM and only support TLDs" - so no more ad attribution for multi-tenant domains.
2. Facebook: "some sort of vetting process to determine who is using subdomains in a way that is aligned with the intended purpose of the PSL" - so Apple takes over the PSL inclusion process and institutes strict vetting to prevent abuse of PCM, which would presumably take months to implement.
This looks like a serious design problem with no solution that could be implemented before ATT drops.