I would say historically anthropology is a field that doesn't do interviews similar to sociology. However they might be shifting toward more interviews, who knows? I applied to around 8 programs as well and got 1 interview, 1 acceptance with no interview even though other people posted they had interviews with POIs,1 rejection with a school that did interviews, and I haven't heard from the other schools. So I think the major thing is that it varies between schools.