Here to seek secrets/conspiracies/social norms of people in Puri Sevaka Society

I know a friend (30F) who is about to be married (love marriage) to a guy (33M) from this society. The guy seems nice to my friend, however the girl has serious doubts about his family and relatives as they look down at her and her family and seems very ancient. Anyone care to share their experiences please dealing with people of the Sevaka Society? Has anyone married or anyone you know married into Sevaka family before?