Memo is perfect for quote authors (block chain proves FIRST source of a quote - NO FALSE claims by third party’s). Its great if you want data permanent & guaranteed for imagination and innovation...
Oh wow, how cool. You could also write a document, then post the hash of that to the blockchain. Then later you could prove you had the document at an early date without revealing yet.
For me – Innovative/creative posts on memo, then Twitter (esp after exhausting my memo.cash followers market on a tweet). General posts I like Twitter (deletion capability).
(You have to think twice before "memo'ing" - because permanent, ENCOURAGING HONEST. Whereas you don't have to think twice before "tweeting" - because doesn't have to be permanent).