My ideas, newly formed, on how to sell massive numbers of books like Fifty Shades.
Number One: Bad writing is a marketing ploy. People are curious and want to decide for themselves if it is really as bad as critics say:
"That stove is hot."
"Really?" *touches it* "OW!"
Number Two: The author says Fifty Shades was Twilight FanFic.
Author: "This novel is based on *insert famous book here*."
Reader: "OOOOOOOOh. I must buy this novel."