OpenOffice was developed by Sun many years ago. Sun was purchased by Oracle. The 'passion' of Sun for the app is somewhat less at Oracle and many of the original programmers have defected and formed a new Open Source organization to develop Libre. The main differences will probably be the amount of money that is available from Oracle as opposed to the Libre group. Whether any real money is put into the effort by Oracle remains to be seen, of course. Not many businesses are interested in spending money on "free" software. Sooner or later, the app morphs into 'commercial' app, its development stops, the rights to the code is sold, the free version becomes a crippled version of the commercial one, etc.
"Oracle is to data as Adobe is to graphics. Neither seems too concerned about users without large wallets." Grumpy