GPS location?

It seems quite unnecessary that xiialive needs to activate the gps to find my location. I hear that the ads are location-based, but as far as I understand every other app I use find my location based on cell tower location. But my gps icon keeps flashing on and off with xiia live lite. I use a HTC Legend.
Otherwise, xiialive is my absolute favorite app, all categories! Fantastic work, beautiful interface.