That's their model, they make everything easy and take the loss. But after everyone started using them, they can do whatever they want.
I remember 10 years ago a collegue is telling me that that Amazon was great. You order something, it arrives and if there is an issue with the order, you can order a replacement by yourself and it will arrive before even you returned the first item. Few weeks ago I had an issue with an order and you need to contact the customer service for a solution. Chat was not working, you can request a call back but it wasn't working either, they give you a number to call but it isn't working. 4 years ago it was much easier to contact them.
Actually last time, I clicked on the wrong button on Amazon and the item have been ordered in one click. Obviously that wasn't what I wanted to do and needed to cancel it which wasn't a one click action.