Unless everyone bought their Mac and iPad in the last 14 days, returns would be accounted for. And if they resold them, what does Apple care? They still sold the unit at retail price and even if the person who bought it didn't like it, someone else clearly did since they were able to sell it.
Because they want Apple to take a financial bath to force the Board to oust Tim Cook because they operate under the delusion that once he is gone, someone who loves the Mac and doesn't care a whit about anything else will be named CEO and the Mac will be the sole focus of the company and made "great" again.