The motd file, by convention, is displayed whenever you log in to a Unix box. It has been this way for longer than you have been alive.
There is no question of 'use something else'. There is no app store for alternatives to /etc/motd. There is no dialog box that pops up that asks you what alternative to motd you would like to see.
The standard unified method for determining what a system file is composed of is called 'man'. This has also been around since long before you were alive. The author demonstrated correctly through the use of this tool that the ubuntu system for displaying the motd is (a) needlessly overcomplicated, (b) totally broken, and maybe most importantly (c) at odds with its documentation.
Please log out of the internet.