You'll never know what they'll come up with just to make a quick buck. A week of R&D, then a lifetime of profit. A dollar-worth being sold for 25 bucks.
There's also another item I saw that converts your mod into a flashlight. The price of the attachment is the same as buying a whole flashlight. For 1-2 hundred bucks all they can offer are battery housings with, oh yeah, voltage regulators and digital displays, halleluyah!, and we're supposed to say wow, what a state of the art electronic device. Naa. I'm not going to bite any further. I'm through with this whole vaping hobby. I have quit cigs for good and I'm not going to spend another dime in this business.