I requested that they turn on 2FA, since they themselves will become an attack target by requesting so much PII

That said, my experience with trying to use any opt-out service (automated or otherwise) is filled with a lot of "Oops, server error, try again later" responses at the end of filling out a ton of forms about oneself, so I wonder if Optery has some secret sauce, is persistent in the face of server errors, or just is fire-and-forget and thus follows the "spray and pray" method of account removal

If I paid actual money for this, I'd want some observable metric showing that I had 166 public listings in June, followed by 66 in July, or something of the sort.