My problem with this is that it conflicts with identity ownership. If I give every company someunqiueaddress@someservice.com, I no longer have the ability to switch email providers, especially if I only decide to switch after losing my someservice.com account. If I give every company someuniqueaddress@mydomain.org, then I’m still ID’d by mydomain.org. Maybe in a way that automatic linkers miss, for now, but maybe not: how hard is it, really, to automatically determine with decent confidence that mydomain.org is a personal domain, and strip the entire username and subdomain part in the existing normalization step?

It can be some secret mydomain.org, but that still links all my profiles together.

I could buy a different domain for every company, but that’s cost prohibitive, and also piercing WHOIS privacy is just another data sharing agreement away.

Posting this because I’m hoping somebody has a better answer.