When that has happened to me, the problem was most frequently at my ISP and involved blacklists. Thus, ETO may have sent the notice, but your ISP blocked it. Some, maybe all, blacklists expire after a short time, but whoever reported the site can renew the report. That can explain the inconsistency. The ultimate resolution was for ETO's owner at the time, EM, to contact one of the blacklist bundlers and get ETO white listed.
Just FYI, I am currently getting notices from every thread to which I am subscribed.
John