I have at least understood why Steemit Inc is Powering Down !! I have read many previous posts by the community members complaining why Steemit Inc is not giving us sufficient info.
I am sure now with this clarify you have given us of the hardfork causing security issues to Steemit Inc wallets, Steemit Inc might respond and may be some witnesses also might reconsider their decisions..!!!!
Thanks again leader for bringing this out.