Achim from AirGradient here. You raise an excellent point.
Often T&C are indeed just written by lawyers and potentially not being enforced at all.
However, it really does restrict what you can do with the monitors in practical ways.
Let's say you want to build a business around using AirThings monitors with your own dashboard analysing the data and giving value added services. If you don't officially own the data, are you actually allowed to use it and monetize it for your own purposes?
With these T&Cs and if you do this (and I actually know a few companies that do exactly that) you open a legal liability that AirThings could come after you.
Often T&C are indeed just written by lawyers and potentially not being enforced at all.
However, it really does restrict what you can do with the monitors in practical ways.
Let's say you want to build a business around using AirThings monitors with your own dashboard analysing the data and giving value added services. If you don't officially own the data, are you actually allowed to use it and monetize it for your own purposes?
With these T&Cs and if you do this (and I actually know a few companies that do exactly that) you open a legal liability that AirThings could come after you.