Related issue from earlier this year:

http://www.thepassivevoice.com/2017/04/the-bestseller-list-box-set-gig/

http://www.kboards.com/index.php/topic,250491.125.html

Related issue from earlier this decade:

https://www.forbes.com/sites/jeffbercovici/2013/02/22/heres-how-you-buy-your-way-onto-the-new-york-times-bestsellers-list/#5f8ce0c63a7b

Related issue from last century:

https://en.wikipedia.org/wiki/I,_Libertine