If I understood this right, then my only complaint on memo.cash (that I am not in control of my own keys) is finally solved - and with a userfriendly design!
Hey will this allow me to use my vanity gen addresses on Memo.cash? I don't ever want to upload their private keys.
with this, you can use your vanity address as your identity. your posts won't be made by it directly, but linked to it. memo would have their own child keys, which you sign to approve.