The super studier

Billy Mac Billy had met too much failure at the antique stores and he had leaned his lesson.
He instead opened a book stand in the tow square.
However, for once, Jack didn’t mind. It’s a legitimate business, he thought.
He was wrong.
“I want to hire you.” Tom, a local kid.
He placed his money on the table.
“It’s 10p right?” asked Tom
“Yup!”
“I’m sorry.” said Tom. “My memory is slow.”
Tom’s face darkened. “That’s why I bought that Super Studier.”
Jack was confused. “What’s a Super Studier?”
“It’s a book that helps you learn quicker. Billy Mac Billy gave it to me on a special rate: A Full set for £1. I went and bought it, went home and realized the words in it were gibberish.”
“1 year ago, Samuel Tompkins here was in Harvard, about to drop out. His business degree was failing miserably. He happened to meet me and he tried one of my Super Studiers. Now Look at him!” Mr. Tompkins was grinning ear to ear in his graduation clothes as he held his Harvard certificate up high.
HARVARD UNIVERSITY was emblazoned on this.
Underneath was Latin.
Jack could just barely make out and translate the Latin.
“So buy your Super Studier today for incredible rate at £10. Buy one get one free!”
Jack saw lots of his scholarly lacking classmates charged in.
Hopefully that book actually makes you smarter,” said Jack bitterly. “It’ll make them realize they’ve been scammed.”
Why?