“When a car salesman offers you a “premium car care” package, don’t buy it. It’s a scam. Basically, we charge for simple things you can do yourself. Also if a car dealership sells you a used car and they told you it has been fully serviced… take it to your local mechanic and have it serviced properly.”
It's actually true for many products. Many cheap supermarket house brands are often made by the big premium brands just in a different package. Some hygiene products are available from dozens of different brands but in reality, there are only two companies in the whole country that make it and with the exception of some slight changes to colour and fragrance it was all the same stuff.