I took one of those shuttle vans from La Guardia into Manhattan a few weeks ago, and noticed the oddest thing- the van didn't have an EZ Pass transmitter. It paid for its trip through the tunnel with cash.
I assume this van wasn't an occasional user of the tunnel, but rather that it went through a toll booth of one kind or another multiple times a day. Yet it wasn't using the tool to make the trip a tiny bit faster. Odd.
The message it sent to me was: We don't care about your experience with us. You chose the cheap route, we'll treat you like crap.
Sometimes the low end solution can get away with that.