Clientele information is confidential, even during a war.
The Tradelane/Jumpgate system acts as a futuristic internet of sorts, connecting people across Sirius. I'm assuming that even if Ageira is monitoring the tradelanes, that Rhienland can at least mask their signals. Perhaps more.
"The thirteen saloons that had lined the one street of Seney had not left a trace. The foundations of the Mansion House hotel stuck up above the ground. The stone was chipped and split by the fire. It was all that was left of the town of Seney. Even the surface had been burned off the ground.
Nick looked at the burned-over stretch of hillside, where he had expected to find the scattered houses of the town and then walked down the railroad track to the bridge over the river. The river was there."
