Slate & Bow interview questions

After submitting a resume online and completing a phone interview I was scheduled for an interview at something very specific like 10:15. There were 6 other applicants scheduled for the same time. All of us were being asked one by one to go back and talk to like 3 different interviewers. EVERYONE was female. The receptionist, the employees and all the other applicants. I was under the impression that it was for a real marketing position, I have 17 years experience in web design and digital marketing. I have managed multi-million dollar products and I happen to be looking for a full time position. The girl who interviewed me could not have been more than 23. She kept asking me why someone who "knows how to do marketing" would need a job. She asked "If you really know how to do this, then why are you not generating all the money that you would ever need". I answered that my my wife had a health condition and I really needed a steady job. She kept being rude and asking the same thing in different ways as if I was lying to her. After 20 min of deposition style questioning she eventually admitted that the real position was sampling products at Costco. The pay was like $12 per hour and they are only pretending to be a marketing firm. They are really a temp agency for grocery stores. If you are a true professional, don't even bother stopping by.