At one time it was really a big deal to collect a large theocratic library.
Before the bound volumes, people were encouraged to keep copies of every Watchtower and Awake and then they could buy binders for them at the end of the year.
Then the bound volumes came out, sometimes with secretly revised information, and people bought everything all over again. Even as a child, I thought this was stupid and could see blind profiteering as the reason behind it.
Eventually when the WT discovered that people were using their old literature against them, it was encouraged not to be reading old literature that was old light.
But many older JWs still have massive amounts of old literature. When they died, their family members are stuck getting rid of it all.
Maybe putting them in the library pods is an option some are taking, especially if they are conflicted about the value of the books.