Is something i once did as a self signed (my blog) and those email addresses are still in the wild in spammer land or the nicer title of lead generators. There all spammers and let me not forget to remind you of our bus trips (my blog).
Since i have ‘real’ ssl i notice that email address is also strangely absent from the certificate issue process.
However the filter (my blog) catches all of these and i dont think i ever linked the address back to a mail storage container on the various updates the system has seen since it is not in use anymore.
So if your buying ‘high quality leads’ from a person like Robert and his friends i probably wont see it. However scalping the address for some purpose is something people will do but made useless because of them.