That is new....certainly not required last time I contacted! Nor was the " I'm not a bot" thing.
I am assuming there have been some problems?
I have no problem providing my mobile number! I doubt A2k will be doing international calls any time soon! I'd also be happy to provide my brand new VOIP number....since I the number may possibly be requested to provide personal support for dicey issues?
I think the changes ought to be explained publicly though.
I would certainly not be happy for the majority of websites to have anything but an email address.
I don't think A2k is a black hat site Msolga, though I fully understand your questioning of the new, or newish, help protocols.