What difference does it make if they are being used or not, you are talking about sales, they were sold. Agreed, it would be nice if they were being used and loved, with PRs announcing how great the KDS is preforming.
I know of 10 laptop computers that were bought 18 months ago and have never been used. Does that mean that DELL sells a crappy system and is on the verge of going under? NO, it just means the laptops were purchased following a plan, events did not go as planned. Could it be the same with VIRC, perhaps one of the machines is doing all that is needed at this time. Does not mean that the other two won't be used in the future.