Yes, I used it to create one of my apps. Very satisfied by the feature set provided by them. Very excited about the new changes they will be rolling out from beta soon.
In all fairness, a known range of TOR IP's is blocked by most websites such as google.com . And a login from any such anonymous sources may be used to perform malicious activity on your behalf.
Thank you for summing it all up, so well. C# has a language has so much stuff built into itself. When we work with java we have to take help from frameworks such as Spring etc .