Some items are sale off (or launch at) $29 or $39 original price $69 or $79 but look at those past items of that author, I see no such items at that $69 or $79 price. That is totally false advertisement and cheating!
I saw one author also play cheating with the buyers: Increase the price to $99 and said it is sale off from $129 $149 well it once was only $59 most of the time.
And many case studies I can't count...authors are gaming the system and unfortunately this leads the market feel very low cheap & mediocre with many cheaters.
I can see the guideline but cannot find any penalties, why they have to obey when they are safe or even encouraged to do that?