I never heard the "songbook in the mailbox" thing, but I heard plenty calling "dibs" after Armageddon on some of the nicer waterfront homes in our territory.
One moment they are condemning the householder for being out "slaving" for their materialistic lifestyle, rather than being home to hear the "life saving message of JW's ". Then in the next breath, lay claim to the householders home after he's killed during Armageddon.
There were a number of home builders in our Congregation who would stand on the platform condemning the worlds materialism yet they depended upon those very people to purchase the luxury homes they had up for sale.
My eyes were constantly rolling, toward the end of my days as a JW.