Usually the fairness that people seek in these situations is just the desire to dump the unfairness on someone else. E.g. the demand to extend the discount to 3-month old purchases ignores the fact that the people who bought a car 3 months and 1 day ago will feel more upset and wronged.
Dylan16807|3 years ago
Also you can handle that with a staggered discount.
limitedsupply|3 years ago
In general I agree that it’s unreasonable. Discounts happen, prices change, we can’t always time purchases perfectly.