If you are an early adopter of the iPad, you have a device that came with no 3G service and many of these folks are looking for devices that will get them online using a mobile network. If you are a user that happens to be in one of the 4G service areas that Clear operates that fast WiMax network might have looked really good combined with the company's iPhone/iPad/touch specific iSpot hotspot device.
A few weeks back you could get the thing for only $20 as a holiday special. That special apparently helped Clear to clear out their stock of the iSpot devices. A Clear rep on the official Clear forums has told users that the device has been discontinued. Apparently, you can still find the iSpot in some retail stores, but after that stock is gone, there will be no more offered.
Clear has apparently held some of them back to serve as warranty replacement in the event a user has issues with one under warranty. The iSpot would only work with iOS devices and some users had issues getting it to work period. This may be one of the big reason the item is no more. If you already own an iSpot device, the Clear rep said the service would continue to be supported.