We just found this quote on the ABC News website in a story about a new Magic Jack device. If you read between the lines, this quote speaks volumes.
Borislow said YMax has sold 5 million magicJacks for landline phones in the last two years, and that roughly 3 million are in active use.
So what’s happening with the other 2 million devices? Our guess is that they are sitting unusable in the homes of consumers who can’t get them to work. How nice it must be to be able to sell a product that goes unused and unsupported.

Totally illogical conclusion. Many of the ‘inactive magic jacks’ are probably only used for occasional travel and not regularly active. Even if you assume ‘active’ to mean ‘paid up’ then many are like mine, out of the free trial period and sitting on a shelf until I need a second number again, at which time I’ll pay for another year and it will become ‘active’ again.