The limit is only for DECT devices. Philips Hue Lights, Philips Bridge and Nuki Devices are not counted in to it.
Connection with bridges (Hue, Nuki) is done via LAN interface.
1 bases = 48 sensors max.
2 bases = 96 sensors max.
2 bases is a limit per house
limitation in the cloud: 128 devices per user.