I am still pretty new to the BB and even newer to the gps (verizon's is not enabled without THEIR service). So I got a puck. But from what I read, without data vervice, in the boonies, there will be NO maps since they cannot be downloaded. That is unfortunate. My garmin 76cs will be with me for a longer while.
I have to guess that these companies have learned that like razors, the money is in the replaceable blades or in this case MAPS. I still recall have a version of Norton's anti-virus that updated for free. No subscriptions needed. That has long since gone. So, these folks have followed that lead.