I've had this experience with Monoprice and a few AliExpress sellers at least. "Oh, it doesn't work? Meh, all yours, have a good one" is a very good way to make

I've had this experience with Monoprice and a few AliExpress sellers at least. "Oh, it doesn't work? Meh, all yours, have a good one" is a very good way to make customers come back. It's ripe for abuse, so I'm sure companies have to be careful with it, but if it's low margin stuff it probably doesn't matter much anyways.