Wait, so Twitter support did that? I guess they can but it seems slightly sleezy.
Edit: On second thought, I don't know what sort of personal communication standard I can hold UberMedia to. I don't think you actually need to register with them to use the client so they might not know who their users are to contact them. Well, apart from the 2.5 million twitter followers their account has.
I'm all for enforcing a license, but I don't think that last line was necessary.