The minimum is 6 times in the last six months, when i asked the interviewer directly after she told me to tell my friends bout the survey she didn't answer me, rather she said she really didn't want fake responses (i was asking so i knew which friends to tell, not to try and scam). Clearly after the interview she wasn't giving my intelligence much credit because i could just tell my friends to give the same number i did if they were that desperate for $30, likewise people here have already given numbers scammers could use so i don't see a problem posting this.