Hedging their bets on their getting life everlasting in good health on a paradise earth surrounded by their resurrected family and friends.
Actually few contribute voluntarily. My husband, father, 3 male cousins, uncle, grandfather were accounts servants over the years. Some were lucky to have wealthy jws that donated because it was also a good tax deducation as well providing them influence in the congregation, circuit, and branch.
They said that out of congo of 100, perhaps 10 donated more than $75 a month. One brother used to hold back for several months until there was a financial crisis then he would save the day with $800 to $1000 which was the same amount he donated each month for 8 to 9 months, $100/month.
My husband knew who donated that did by check or had to get a slip for the IRS.