3-step interview process, pretty obvious it's a devil corp from the first one. If you have any doubts, just ask the question. "What does Conducting in-person sales presentations with the client's customer base, like the job description says, mean, and how would I do this if I were in the role?" and watch the interviewer scramble to come up with a better way to say door-to-door selling. After asking this question, I told the interviewer I was no longer interested.
Just don't, these types of companies will make you pay more for gas going from door to door than you'll be paid.