It's a scam. They will claim they have correct and actual test questions, test dumps and so on, but if you choose to waste your money - you will only get a $#*!ty pdf with some questions, WRONG answers and many, many typos and misspellings.
Also - when you try to claim your money back, they will say it is not possible for "practically any type of an exam".
Long story short - it's a scam. Don't give them your money.