This is a pretty cool use of the memo pub/priv tech available on steem there was something in the early days of steem that was sort of worked like a twitter page each day the app would post a new blog then all posts from that day by users where simply comments on the blog. it would be interesting to combine the memo key encryption method with a chat stream like this and have the app be able to encrypt for each user in the chat stream using their pub/priv keys pair. Thanks for posting about this man.