Its a common mis-conception that LoRaWAN protocol = subscription to a public network.
The LoRaWAN specification describes the protocol and network architecture, but there are no constraints on how it is deployed. Even the LoRa Alliance avoids dictating anything about business model. FLEXIBILITY is one of the key advantages of the LoRaWAN standard over competing LPWAN technologies.
A LoRaWAN network could be public or private, 1 gateway or 1000 gateways, the size of a building, a campus, a smart city, a county, country or even global !
The LoRa Alliance is full of contributing companies and most have a product or service they are promoting. There are network operators offering national networks with subscription, but there are also hardware/software/platform vendors providing everything needed to put together your own private network with off-the-shelf building blocks. You could even download the standard and build everything yourself from the ground up if you have the time and investment to do it, but for most time-to-market is the most important factor right now.
So instead of looking for proprietary alternatives, it is recommended that a private LoRaWAN network deployment is the best alternative to the classic subscription model. The higher the adoption, the better the cost structure will become over time.