I can understand why they chose to do this. I have subscribed to that particular list (as I'm sure most people who frequent this web site have), and so have seen for myself what they are talking about. I just hope that they realise there are people like me who don't often, if ever, post to the list, but read it with great enthusiasm, and will be sad to no longer hear news direct from them.
I wish them the best, and I look forward to seeing the results of all their hard work for myself.