I was waitlisted for interview last year at MWU-AZ and I never ended up receiving an interview invite. As a matter of fact, I dont think anyone on the waitlist last year actually got an interview. I never received a rejection, I just got a "MWU Arizona campus End of Cycle Notification" email in March saying that MWU interviews have concluded. So basically if you get waitlisted for an interview, its better than a rejection, but there is a very slim chance you will get an interview from them.