Homey Bridge - Adding Amazon devices

Well that is not obvious since the main page says it supports WiFi !!!
Extend with Homey Bridge for wireless connectivity.
WiFi, Zigbee Z-Wave, Bluetooth, 433MHz, Inferred

My original reason for buying was to reduce the need to buy a hub from every brand and have one hub/bridge to rule them all. The other reason was I like the Flows which seem pretty powerful. but if all WiFi based devices are not supported then I am wasting my time.

The impression from the sales blurb is that the Pro is one off payment and the bridge is cheaper but come with a subscription. This appears to be not the case.