Online fraud: Blatancy and latency | The Economist

Blatancy is a means of weeding out all but the most credulous respondents. (…) A big cost for [spammers] is the time they spend coaxing fully into their net those who show initial interest. So they need to select the most promising targets, rather than timewasters or the wary. “By sending an e-mail that repels all but the most gullible, the scammer gets the most promising marks [victims] to self-select.”

Online fraud: Blatancy and latency | The Economist