Are the Ferengi rules of acquisition, from Star Trek, useful in the real world?

It sounds like Trump’s rules. It has worked for him so far, but there are several law suits against him.

They work pretty well for many in the world of the politico/military/industrial complex so I suppose it depends on whether you consider that to be the “real world” or just an unfortunate excrescence upon it.

Only if you are a crook at heart.

Some are useful, but many are horrible. Some I would categorize as immoral, unethical, and even illegal or a breech of contract.

Most are self serving, and while self serving can sometimes be ok, in the extreme where it hurts others it’s detrimental to them, you, and society.

Useful or not, it is clear that these rules are adhered to religiously by contempirary turbocapitalists.

Not really. They sell trust and social capital without methods of recouping it. The rules might be slightly useful to gain a limited advantage for a limited time, but I can’t see how they can lead to profit, long term.