Hard to answer this question with specifics as sidewalk is still in development. Observations are my own, from when I developed devices using LoRa and nbiot. I

Hard to answer this question with specifics as sidewalk is still in development. Observations are my own, from when I developed devices using LoRa and nbiot. In general, NB-IOT is operated by the cellular companies and has associated reliability expectations. Additionally the cruft leftover from it being a cellular product really added to complexity and cost to implement. Unlicensed spectrum has much lower reliability, and I would expect them to charge less accordingly.