[s1artibartfast]

How did they benefit in any way? ( I read the article but didn't watch the documentary).

It sounds like they needed security guards, and the firm they hired turned out to be one that liked to play fascist dress-up.

Did they benefit more than if they had hired normal security?

[krageon]

The firm kept slaves (took passports, no pay, etc) to do the work in the warehouses that were guarded. Free labour is very cheap, that would be how they benefited.