There are already much cheaper IEMs that do, but that's OT.
My view is that it has to do with the market tolerance towards such pricing. No matter how much we rage over the pricing people will buy it simply because of all the attraction it is getting.
There is something magical about exposure no matter how negative it is, if people are talking about a product it will just attracts attention and potential curious buyers.
Well, I would imagine tolerance is always there, I don't think sales figures for IEMs price in this range are that great anyway.