Original sentence: ResultSource accomplished this objective – briefly reaching #1 in the "Advice How-to" category by buying the book using payment methods such as gift cards to temporarily boost the sales of the book at its release
Edited sentence: ResultSource accomplished this objective – briefly reaching #1 in the "Advice How-to" category – by buying the book using untraceable payment methods such as gift cards to make it appear that the book was sold in far greater numbers than were actually sold to end customers