This has definitely been one of the most common marketing strategies out there and as you indicated is a result of manipulation based on human behaviour. There have been a few studies over the year to show how prices of deals don’t often reflect a ‘good’ deal when you compare them to average prices throughout the year. Black Friday sales are really bad for employing this strategy. Thanks for the summary
Thank you for your quality comment. This article is simply my personal view of how discount vouchers can be disadvantage when we buy things we do not need. It is true that a good deal may not really be a good deal. I am seeing sales at my local shops almost throughout the year before Covid-19. A great discount is still good if we can buy what we need but most of us will go online to buy since it is cheaper nowadays.