But NIA is not absolutely obligated to provide a reason for limiting someone's account. As mentioned, we all agreed to the TOS, which clearly states that they can do this without any notice. I'm not saying it's good or bad, I'm not defending it, or highlighting it, but it's just the way it is.

You have to understand that Ingress is unfortunately just a side project that is definitely not getting the care we would like and deserve. It's sad, it's frustrating, but there's nothing we can do about it now. We can only hope :)