@James *******
I think the OP's question is legitimate. Out of the 3 examples you've given, one does not say anything about the bank deposit for dependents. The 2 other applicants got their visa, but they had 500K per applicant, even in the case of children. Whilst it proves that one can be successful if they have 500K per dependent, it does not necessarily mean that 500K per dependent are needed at this embassy.