This still suffers from the MitM / Two Generals Problem, and is existentially problematic if they also demand the simple, reasonable sum of the first BB(17) numbers modulo Grahams number, within 14 business local parsec-years.
Their spam filter may be an annoying ping acknowledgement, a directed gamma ray beam from soft gamma repeater, just to irradiate their own hoax-doers suspects.
Their spam filter may be an annoying ping acknowledgement, a directed gamma ray beam from soft gamma repeater, just to irradiate their own hoax-doers suspects.