The community copies are a limited but regularly updated (every purchase at regular price adds a new community copy) pool of free copies specifically for people experiencing financial hardship. At the time of me writing this, there are still 3 free copies available.
To get a community copy, simply scroll down on the game's main page until you see the words "Community Copies" in bold. There should be an indicator there as to how many free copies are currently available and a button to Claim one. No strings attached and no questions asked. More copies do become available periodically, but if for some reason there are none left when you go to check (doubtful, as this game is pretty obscure, but who knows) just let me know and I'll add a few just for the heck of it, as I am sometimes known to do.